Licensed Copy: Ms Mary Groom, British Standards Institution, 24/05/2012 13:48, Uncontrolled Copy, (c) The British Standards Institution 2012 BRITISH STANDARD AEROSPACE SERIES Specification for Specification for cadmium-plated, cadmium-plated, mushroom-headed, mushroom-headed, unified-thread, unified-thread, slotted slotted drive bolts drive, bolts ICS ICS 49.030.20 49.030.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BS BS4A 4A113:1999 113:1999 Incorporating +A1:2012 Corrigend a Nos and Incorporating Corrigendum No Corrigenda Nos 1, 2, and Licensed Copy: Ms Mary Groom, British Standards Institution, 24/05/2012 13:48, Uncontrolled Copy, (c) The British Standards Institution 2012 BS BS 4A 4A 113:1999 113:1999+A1:2012 Committees responsible for this British Standard The of this this British BritishStandard Standardwas wasentrusted entrusted Technical Committee The preparation preparation of totoTechnical Committee ACE/12, Aerospace fasteners fastening systems, systems, upon upon which which the following ACE/12, Aerospace fasteners and and fastening the following bodies bodies were were represented: represented: Civil Aviation Authority (Airworthiness Division) Confederation of British Forgers Ministry of Defence Society of British Aerospace Companies Limited Co-opted member This British Standard, having This prepared British Standard, been under the having been prepared under the direction of the Engineering direction of the Engineering Sector Committee, was published Sectorthe Committee, was under authority of the published under the authority Standards Committee and comes of the Standards Committee into effect on 15 May 1999 and comes into effect on 15 May 1999 BSI 2010 Amendments issued since publication © The British Standards Institution 2013 2012 Published by BSI Standards Limited 2013 2012 Amd No Date Comments Amendments/corrigenda since Amendments/corrigenda issued since publication publication Amendments issued sinceissued publication The following BSI references relate to the work on this standard: The following BSI references Committee ACE/12 relate to the reference work on this Drafts for comment standard: 97/717136 reference DC, Committee ACE/12 12/30264058 DC 97/717136 DC Draft for comment 10624 No Amd Amd No 10624 10624 C2 C2 C2 A1 A1 C3 C1 C4 ISBN 707263 ISBN 978 978 580 82660 79098 81924 01 November Deletion of entries from clause Date Comments Date Comments Date 1999 November 1999 November November1999 1999 March See foreword March 2010 2010 March March2010 2010 November 2012 See Foreword November November2012 2012 See Foreword Foreword February 2013 See Foreword February See April 2013 2013 See Foreword Foreword Licensed Copy: Ms Mary Groom, British Standards Institution, 24/05/2012 13:48, Uncontrolled Copy, (c) The British Standards Institution 2012 BS 4A 113:1999 BS 4A 113:1999+A1:2012 Contents Page Committees responsible Inside front cover Foreword ii Scope Normative references General requirements Materials and manufacture Dimensions and tolerances Screw threads Protective Anti-corrosion treatment finish Hardness values Identification and marking 10 Quality assurance procedure Figure Ð Dimensions of bolts Figure Ð Bearing length, clamping length and overall length of bolts Table Ð Materials for manufacture of bolts Table Ð Dimensions of bolts Table Ð Bearing length, L, clamping length M and overall length of E bolts © The British Standards Institution 2013 2012 BSI 2010 i i BS BS 4A 4A 113:1999 113:1999+A1:2012 BS BS 4A 4A 113:1999 113:1999+A1:2012 BS 4A 113:1999 Foreword BS 4A 113:1999 Licensed Licensed Licensed Copy: Licensed Copy: Ms Copy: Mary Ms Copy: Ms Mary Groom, Mary MsGroom, Mary Groom, British Groom, British British Standards British Standards Standards Standards Institution, Institution, Institution, Institution, 24/05/2012 24/05/2012 24/05/2012 24/05/2012 13:48, 13:48, 13:48, Uncontrolled 13:48, Uncontrolled Uncontrolled Uncontrolled Copy, Copy, (c) Copy, The (c) Copy, (c) The British The (c) British The British Standards British Standards Standards Standards Institution Institution Institution 2012 Institution 2012 2012 2012 Foreword Foreword Foreword This hasisbeen prepared Technical Committee ACE/12 ThisBritish BritishStandard Standard published byby BSI Standards Limited, underItlicence from The British Standards Institution supersedes BS 3A 113:1962 which is withdrawn This hasisbeen prepared Technical Committee ACE/12 ThisBritish BritishStandard Standard published byby BSI Standards Limited, underItlicence Tecnnical This British Standard has been prepared by Technical Committee ACE/12 from The British Standards Institution supersedes BS 3A 113:1962 which is withdrawn The start and finish of text altered by Corrigendum No is indicated in the text This British Standard has been prepared by Technical Committee ACE/12 It by tags RS supersedes BSfinish 3A 113:1962 which isprepared withdrawn BS 4A 113:1999+A1:2012 supersedes BS 4A 113:1999, which is withdrawn Tecnnical This British Standard has been by Technical Committee ACE/12 The start and of text altered by Corrigendum No is indicated in the text This British Standard has been prepared by Technical Committee ACE/12 It by BSor RS supersedes BSof 3A 113:1962 which isthe withdrawn This revision A 113 relevant requirements in BSin Ain 100 Ittextby tags The start and finish ofaltered textrefers altered by Corrigendum No is indicated thetext Text introduced by to Amendment No is 2indicated the BStags 4A 113:1999+A1:2012 supersedes BS 4A 113:1999, which is withdrawn incorporates amendments 1, and are However, it reverses amendment because the by tags Minor editorial changes not tagged RS This revision of BSorA 113 refers theCorrigendum relevant requirements in BSin Ain 100 Ittextby tags The start and finish ofaltered altered by No is indicated the Textdepths introduced by to Amendment is 2adequate indicated the text slot specified intext amendment may not No provide driving force in certain incorporates amendments 1,refers and it reverses amendment because This revision of BSA A 113 toHowever, the relevant requirements in100 BS A 100 the by tags Minor editorial changes are not tagged RS This revision of BS 113 refers to the relevant requirements in BS A It circumstances slot depths specified in amendment may provide adequate driving in 4certain It incorporates amendments 1, 23.and 3.not However, it reverses amendment incorporates 1,refers and it reverses amendment force because Thisrevision revisionamendments BSA A 113 toHowever, the relevant requirements in100 BS A 100 the This ofofBS 113 refers to the relevant requirements in BS A It circumstances because the slot depths specified in amendment may not provide adequate A British Standard does not purport to include all the necessary provisions of a certain slot depths specified in amendment may provide itadequate driving force in It incorporates amendments 1, 23.and 3.not However, reverses amendment incorporates amendments 1, and However, it reverses amendment because4the driving force in certain circumstances contract Users of British Standards are responsible for their correct application circumstances because the slot depths specified amendment may not provide adequate A British Standard does not purport 4in tomay include all the4 necessary provisions of in a certain slot depths specified in amendment not provide adequate driving force The start and finish of text introduced or altered Corrigendum No by driving force in certain circumstances contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity circumstances A British Standard not purport to include as all athe necessary provisions ais been CAUTION BS text Adoes 113 bolts have cadmium plating material whichofhas indicated in the by tags from legal obligations contract Users of British Standards aremany responsible for their correct application The startStandard and finish ofnot text introduced or altered by Corrigendum No ais and restricted and/or banned for use in countries owing toprovisions environmental Compliance with a British Standard does not of itself confer immunity A British does purport to include all necessary CAUTION BS text A 113 bolts have cadmium as athe plating material whichofhas been Corrigenda Nos 1, and are not tagged indicated in the by tags health concerns; they should not be used in new product designs Local officials from legal obligations CAUTION BS A 113 bolts have as plating material which cadmium has been contract Users of British Standards aremany responsible their correct application Compliance with a British does not for of itself confer immunity restricted and/or banned forStandard use in countries owing to environmental and should be consulted aboutfor any concerns oncountries the use of cadmium-plated parts.and restricted and/or banned use in many owing to environmental from legal obligations health concerns; they should not be used in new product designs Local officials CAUTION BS A 113 bolts have cadmium as plating material which has been Compliance withthey a British Standard does not of itself designs confer immunity health concerns; should not be used new product Localparts officials should be consulted about any concerns onin the cadmium-plated restricted and/or banned for use in countries owing to environmental This publication does not purport tomany include all use the of necessary provisions of aand from legal obligations should be consulted about any concerns on the use of cadmium-plated parts health concerns; they should not in new product designs Local officials contract Users are responsible forbeitsused correct application This publication doesabout not purport to include all use the of necessary provisions of a should be consulted any concerns on the cadmium-plated parts This publication does not purport all the necessary provisions of a Compliance with a British Standard cannot confer immunity from contract Users are responsible fortoitsinclude correct application contract Users are responsible for its correct application legal obligations This publication does not purport to include all the necessary provisions of a Compliance with a British Standard cannot confer immunity from Compliance with a British Standard cannot confer immunity from contract Users are responsible for its correct application legal obligations legal obligations Compliance with a British Standard cannot confer immunity from legal obligations Summary of pages Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages to and a back cover Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages to and a back cover Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages to and a back cover This document comprises a front cover, an inside front cover, pages i and ii, pages to and a back cover ii ii ii ii © The British Standards Institution 2013 2012 BSI 2010 © The British Standards Institution 2013 2012 BSI 2010 Licensed Copy Licensed Licensed Licensed Licensed Copy: Copy: Copy: Ms Licensed Ms Copy: Licensed Licensed Mary Licensed Mary MsMs Mary Groom, Groom, Copy: Copy: Mary Copy: Copy: Groom, Groom, Ms Ms British British Ms Ms Mary Mary British Mary Mary Standards British Standards Groom, Groom, Groom, Groom, Standards Standards British British Institution, Institution, British British Institution, Standards Standards Institution, Standards Standards 24/05/2012 24/05/2012 24/05/2012 Institution, Institution, 24/05/2012 Institution, Institution, 13:48, 13:48, 24/05/2012 13:48, 24/05/2012 Uncontrolled 13:48, 24/05/2012 Uncontrolled 24/05/2012 Uncontrolled Uncontrolled 13:48, 13:48, 13:48, 13:48, Copy, Copy, Uncontrolled Uncontrolled Copy, Uncontrolled (c) Uncontrolled (c) Copy, The The (c)(c) British The British Copy, The Copy, British Copy, Copy, Standards British Standards (c) (c)(c) Standards (c) The The Standards The The British British Institution Institution British British Institution Standards Standards Institution Standards Standards 2012 20122012 Institution Institution 2012 Institution Institution 2012 2012 2012 2012 Scope Scope Standard specifies materials and This British This British Standard Standard specifies materials materials and and manufacture, dimensions, protective treatment manufacture, dimensions, protective treatment This British Standard specifies materials and and manufacture, dimensions, protective treatment and and quality assurance requirements for steel quality assurance requirements for steel steel quality assurance requirements for manufacture, dimensions, protective treatment and mushroom-headed slotted with mushroom-headed slotted drive drivebolts bolts withunified unified mushroom-headed slotted drive bolts with unified quality assurance requirements for steel Scope threads , plated, and tensile threads and cadmium a strength of 880/1awith 080 MPa threads and a tensile tensile strength ofbolts 880/1 080 MPa mushroom-headed slotted drive unified Scope strength of 880/1 080 MPa This British Standard specifies materials and threads and a tensile strength of 880/1 080 MPa is NOTE The latest edition of an Aerospace Series standard NOTE The latest edition of an Aerospace Series standard is indicated by latest prefix number This British Standard materials and and manufacture, dimensions, protective treatment indicated by aa prefix number NOTE The edition ofspecifies an Aerospace Series standard is Scope Scope manufacture, dimensions, protective treatment and quality assurance requirements for steel indicated by a prefix number This British Standard specifies and This British Standard specifies materials and quality assurance requirements for steel mushroom-headed slotted drivematerials bolts with unified Normative references manufacture, dimensions, protective treatment and manufacture, protective and mushroom-headed slotted drive with unified threads and a dimensions, tensile strength ofbolts 880/1treatment 080 MPa Normative references quality assurance requirements for steel The following normative documents contain The following normative contain quality assurance requirements steel threads and a tensile strength offor 880/1 080 MPa is NOTE The latest edition of andocuments Aerospace Series standard mushroom-headed slotted drive bolts unified provisions which, through reference inwith this text,is following normative documents contain The following normative contain provisions through reference in this text, mushroom-headed slotted drive bolts with unified The indicated by latest awhich, prefix number NOTE The edition of andocuments Aerospace Series standard threads and a strength of 080 MPa constitute provisions of this British Standard For provisions through reference in indicated by awhich, prefix number constitute provisions of this British Standard For threads and a tensile tensile strength of 880/1 880/1 080 MPa provisions which, through reference inthis thistext, text, dated references, references, subsequent amendments to,For oris NOTE The latest edition of an Aerospace Series standard constitute of British Standard ofthis this British Standard For dated subsequent amendments to, or constitute provisions NOTE The provisions latest edition of an Aerospace Series standard is Normative references indicated by a prefix number revisions of, any of these publications not apply dated references, subsequent amendments to, or dated references, subsequent amendments to, or indicated a prefix revisionsbyof, any number of these publications not apply references ForNormative undated references, the latest edition edition ofapply the revisions of, ofof these dodo not The following normative documents contain revisions of,any any thesepublications publications not apply For undated references, the latest of the publication referred to applies The following normative documents contain For undated references, the latest edition of the provisions which, through reference in this text, For undated references, the latest edition of the publication referred to applies Normative references Normative references publication referred to applies provisions which, through reference in this text, constitute provisions this British Standard For publication referred toof applies BS 3A 3A 100:1991, Specification for general general BS 100:1991, Specification for The following normative documents contain The following normative documents contain constitute provisions of this British Standard For dated references, subsequent amendments to, or requirements for bolts and free running nuts of BS 3A 100:1991, Specification for general requirements for bolts and free running nuts of BS 4A 100:2003, Specification for general provisions which, through reference in this text, provisions which, through reference in this text, dated references, subsequent amendments to, or revisions of, any of these publications not apply tensile strength not exceeding 249 MPa for bolts running nuts of requirements for bolts and free running nuts of tensile strength not exceeding 249 MPa requirements and free of British Standard For constitute provisions constitute provisions of this this British Standard For revisions of, any of these publications not apply For references, the latest edition of the strength MPa tensile strength not exceeding 11 249 tensile not exceeding 249 BS S Sundated 147:1976, Specification for 0.5 %MPa dated references, subsequent amendments to, or BS 147:1976, Specification for 0.5 % dated references, subsequent amendments or For undated references, the latest edition ofto,the publication referred to applies Nickel-chromium-molybdenum steel bars for the the BS S 147:1976, Specification for steel 0.5 %bars revisions of, any of these publications not apply Nickel-chromium-molybdenum for revisions of, any of these publications not apply publication referred to applies BS 3A 100:1991, Specification for general manufacture of forged forged bolts bolts andsteel forged nuts For undated references, the latest edition of nuts manufacture of and forged Nickel-chromium-molybdenum bars forthe the For undated references, thefree latest edition of the BS 3A 100:1991, Specification forrunning general requirements for bolts and nuts of publication referred to applies manufacture of forged bolts and forged nuts BS S 149:1976, Specification for 1.75 % BS S 149:1976, Specification for 1.75 % nuts of publication referred to and applies requirements for bolts free running tensile strength not exceeding 249 MPa Nickel-chromium-molybdenum steel bars for BS S 149:1976, 1.75 % 3A 100:1991, Specification for general Nickel-chromium-molybdenum bars for the the BS 3A 100:1991, Specification for general tensile strengthSpecification not exceedingfor steel 249 BS S 147:1976, Specification for 0.5 %MPa manufacture of forged bolts and forged nuts requirements for bolts and free running nuts of manufacture of forged bolts and forged nuts Nickel-chromium-molybdenum steel bars for the requirements for bolts and free running nuts of BS S 147:1976, Specification for 0.5 %MPa Nickel-chromium-molybdenum steel bars for the tensile strength not exceeding 249 manufacture of forged bolts and forged nuts BS S 154:1976, Specification for 2� % BS S 154:1976, Specification for 2� % tensile strength not exceeding 249 MPa Nickel-chromium-molybdenum steel bars for the nuts manufacture of forged bolts andsteel forged Nickel-chromium-molybdenum bars, BS S 154:1976, for 2� %billets, Nickel147:1976, 0.5 % BS S 154, 2½% nickel-chromium-molybdenum Nickel-chromium-molybdenum steel billets, BS S 147:1976, Specification for 0.5 % nuts.bars, manufacture ofSpecification forged bolts and forged BS S 149:1976, Specification for 1.75 % forgings and parts (880-1 080 MPa: limiting ruling steel billets, bars, billts, bars, forgings steel billets, bars, forgings and parts (880 – 1080 Nickel-chromium-molybdenum bars for the forgings and parts (880-1 080 MPa: limiting ruling chromium-molybdenum steel bil – ets, batss, Nickel-chromium-molybdenum steel bars for BS Sparts 149:1976, Specification forMPa: 1.75 % Nickel-chromium-molybdenum steel bars for the the section 150 mm) forgings and parts (880-1 080 limiting ruling and (880-1 080 MPa: limiting ruling MPa: limiting ruling section 150 mm) manufacture of forged bolts and forged nuts section 150 mm) nuts manufacture of bolts and forged Nickel-chromium-molybdenum bars for the manufacture of forged forged for bolts andsteel forged nuts section 150 mm) BS 1580, Specification unified screw threads S 149:1976, Specification for 1.75 % BS 1580, Specification for unified screw threads BS S 149:1976, Specification for 1.75 % manufacture of forged bolts and forged nuts BS S 154:1976, Specification for 2� % threads 1580, Specification for unified screw Nickel-chromium-molybdenum steel bars the BS 1580-1-2:1962, Diameters ï in and larger BS 1580-1-2:1962, Diameters ï and larger Nickel-chromium-molybdenum steel bars for the1: BS 1580-1:2007, Unified screw threads –for Part BS S 154:1976, Specification forin 2� %billets, Nickel-chromium-molybdenum steel bars, manufacture of forged bolts and forged nuts BS 1580-1-2:1962, Diameters ï in and larger Screw threads with diameter ¼ in and larger – manufacture of forged bolts and forged nuts Nickel-chromium-molybdenum steel limiting billets, bars, forgings and parts (880-1 080 MPa: ruling BS S Specification for 2� Requirements BS S 154:1976, 154:1976, Specification forMPa: 2� % %limiting ruling forgings andmm) parts (880-1 080 section 150 Nickel-chromium-molybdenum steel billets, bars, Nickel-chromium-molybdenum steel billets, bars, section 150 mm).Unifiedfor BS 1580-3:2007, screw threads – Part 3: BS 1580, Specification unified screw threads forgings and parts (880-1 080 MPa: limiting ruling forgings and parts (880-1 080 MPa: limiting ruling Screw threads with diameters below ¼ in – BS 1580, Specification for unified screw threads BS 1580-1-2:1962, Diameters ï in and larger section 150 mm) General requirements section 150 mm) Requirements BS 1580-1-2:1962, Diameters ï in and larger requirements Bolts shall conform to A 100 BS 1580, Specification for unified threads Bolts shall conform to BS BS A 100 screw BSGeneral 1580, Specification for unified screw threads BS EN 2133, Cadmium plating of steels with Bolts shall conform to BS A 100 BS 1580-1-2:1962, Diameters ï in and larger BS 1580-1-2:1962, Diameters ï MPa, in and larger specified tensile strength ≤ 1450 copper, copper Materials alloys and nickeland alloysmanufacture Materials andbemanufacture requirements Def Stan Electro-Deposition of Cadmium 4.1General The bolts shall by 4.1 The 03-19, boltsrequirements shall be manufactured manufactured by one one of of the the General Bolts shall conform to BS A 100 following methods: following methods: 4.1 The bolts shall be manufactured by one of the Bolts shallmethods: conform to BS Adrawn 100 following General requirements machined from a) machined from bright bright drawn bars bars which which a) General requirements conform to one of the British Standards listed conform to one of the British Standards listed a) machined from bright drawn bars which Materials and manufacture Bolts shall conform to BS A 100 BoltsTable shall conform to BS A 100 in Materials and manufacture in Table 1; 1; conform to one of the British Standards listed 4.1b) The bolts bematerial manufactured by one of the in Table 1; shall cold forged from which conforms to b) coldbolts forged from material which by conforms to 4.1 The shall bemanufacture manufactured one of the following methods: Materials and one Materials and manufacture of the British Standards listed in Table one of the British Standards listed in Table b) cold forged from material which conforms to following methods: a) The machined from be bright drawn bars which 4.1 bolts shall manufactured by one of one of material the British Standards listed in Table the 4.1 bolts shall be manufactured bywhich one the 4.2 The used for the manufacture of 4.2a) The material used for the manufacture ofofforged forged machined from bright drawn bars conform to one of the British Standards listed following methods: following methods: bolts shall have the bolts shallmaterial have the following mechanical properties 4.2 used themechanical manufacture of forged conform to one offollowing thefor British Standardsproperties listed in The Table 1; machined from bright drawn bars which in the finally heat treated condition: in a) theTable finally heat treated condition: bolts shall have the following mechanical properties a) machined from bright drawn barsconforms which in 1; b) cold forged from material which to conform to one of the British Standards listed in a) the finally heat treated condition: conform to one of the British Standards listed 0.2 % proof stress (min): 690 MPa; a) 0.2 % proof stress (min): 690 MPa; b) cold forged from material which conforms to one of the British Standards listed in Table in 1; in Table Table 1;stress: a) 0.2 % proof stress (min): 690 MPa; one of the British Standards listed in Table b) tensile 880 MPa to 080 MPa; b) The tensile stress:used 880 MPa to 1manufacture 080 MPa; of forged 4.2b) for the cold forged from material which conforms coldmaterial forged from material which conforms to to b) tensile stress: 88012 MPa to 1manufacture 080 MPa; c) elongation (min: %); c) elongation (min: 12 %); 4.2 The material used for the of1 forged bolts shall have the following mechanical properties one of the British Standards listed in Table one of the British Standards listed in Table (min: 12 55 %); d) Izod impact (min): JJ (40 ft bolts shall have the following mechanical in c) theelongation finally heat treated condition: d) Izod impact (min): 55 (40 ft lbf) lbf) properties 4.2 The material used for the manufacture of 4.2d) The material used for the manufacture of forged forged in the finally heat treated condition: Izod impact (min): 55 J (40 ft lbf) a) 0.2 % proof stress (min): 690 MPa; bolts shall have the following mechanical properties bolts shall have the following mechanical properties a) 0.2 % proof stress (min): 690 MPa; b) 880 MPa to 080 MPa; in the finally heat condition: BSI BSI 2010 in thetensile finallystress: heat treated treated condition: 2010 b) tensile stress: 880 MPa MPa; c) elongation (min: 12(min): %); to 080 a) BSI 2010% a) 0.2 0.2 % proof proof stress stress (min): 690 690 MPa; MPa; c) elongation (min: 12 %); d) Izod impact (min):MPa 55 J (40 ft lbf) b) b) tensile tensile stress: stress: 880 880 MPa to to 11 080 080 MPa; MPa; d) Izod impact (min): 55 J (40 ft lbf) c) elongation (min: 12 %); c) elongation (min:Institution 12 %); 2013 © The British Standards 2012 d) BSI 2010 impact d) Izod Izod impact (min): (min): 55 55 JJ (40 (40 ft ft lbf) lbf) BSI 2010 in Table 1; b) cold forged from material which conforms to one of the British Standards listed in Table 10 The spec BS 4A 113:1999+A1:2012 BS 4A 113:1999 4.2 The material used for the manufacture of forged of m BS 4A 113:1999 bolts shall have the following mechanical properties in the finally heat treated condition: BS BS 4A 4A 113:1999 113:1999 a) 0.2 % proof stress (min): 690 MPa; Dimensions and tolerances b) tensile stress: 880 to 080 MPa; Dimensions andMPa tolerances 5.1 5.1 All All finished finished bolts, bolts, after after the the application application of of the the c) elongationcoating, (min: 12shall %); conform to the anti-corrosion anti-corrosion coating, shall the conform to the of the 5.1 All finished bolts, after application d) Izod impact (min):shall 55 Jspecified (40 ft lbf) dimensions andcoating, tolerances specified in dimensions and tolerances in anti-corrosion conform to the Figures and and Tables and Figures and and Tables and dimensions and tolerances specified in Dimensions and tolerances Figures clamping and andlength Tables shall conform to Dimensions and tolerances 5.2 The of2 and the bolt bolt 5.2 The clamping length of the shall conform BSI 2010finished 5.1 All bolts, after the application of the to the dimensions and tolerances given in Table Table 3, and andto given in the dimensions and tolerances 5.2 The clamping length of the bolt shall conform 5.1 All finished bolts, after the application anti-corrosion coating, shall conform to the of3,the Dimensions and tolerances Dimensions and tolerances shall be such that, when a standard nut without the dimensions and tolerances given in Table 3, and shall be suchand that, when a standard anti-corrosion coating, shall conformnut to without the dimensions tolerances specified in countersink orthat, ring gauge without countersink has 5.1 All bolts, after the of countersink or gauge has shall be 1finished such when a without nut 5.1 All finished bolts, after the application of the the dimensions and tolerances specified in without Figures and ring and Tables 2standard and application countersink been screwed screwed on, asgauge farshall aswithout possible, by hand with its anti-corrosion coating, conform to the been on, as far as possible, by hand with its countersink or ring countersink has anti-corrosion shall2 conform Figures and 2coating, and Tables and to the leading face within aa far distance M from the underside 5.2 The clamping length of the bolt shall conform to dimensions and tolerances specified in leading face within distance M from the underside been screwed on, as as possible, by hand with its dimensions and tolerances specified in of the bolt head The runout of the thread shall 5.2 The length of22 and the bolt shall conform the dimensions and tolerances given inthe Table 3, not andto leading face within aTables distance from underside Figures 11 clamping and 22 and of the bolt head The runout ofM the thread shall not Figures and and Tables and exceed twice theand pitch the dimensions tolerances in Table 3, not and shall be such that, when a standard nut without exceed twice the pitch of the bolt head The runout of given the thread shall 5.2 The clamping length the shall conform 5.2 The clamping length of the bolt bolt shall conform to shall betwice such when standard nut without countersink orthat, ring gaugeaof without countersink has to exceed the pitch 5.3 The nominal length of the bolt shall be the and tolerances in 3, and 5.3 The nominal length ofwithout the given boltcountersink shall be the the the dimensions and tolerances given in Table Table 3,has and countersink oron, ring beendimensions screwed asgauge far as possible, by hand with its which shall bethe the minimum bearing L 5.3 nominal of the,, M bolt shall be shall be such that, when aa standard nut without which shall be the minimum bearing L shall The be such that, when standard nut without been screwed on, length as far as possible, by hand with its leading face within alength, distance from the underside minimum clamping Mmin , less two thread bearing length L countersink or ring gauge without countersink has minimum clamping length, M , less two thread , which shall be the min countersink or ring without countersink has Mthe from the underside leading facehead within agauge distance of the bolt The runout of thread shall not pitches been screwed on, as far as possible, by hand with pitches minimum clamping , less thread min.the been on,The aslength, far as M possible, bytwo hand with its of thescrewed bolt head runout of thread shall notits exceed twice the pitch pitches NOTE bearing L in Table Table are in in 0.10 inch inch leading face within aa distance from underside NOTE The The bearing lengths L quoted quoted M in are 0.10 leading face within distance M from33 the the underside exceed twice thelengths pitch increments but wherelengths 0.05runout length increment is3 required required this 5.3 of the shall the increments but where aalength 0.05 length increment is this of the bolt head The of the thread not NOTE Thenominal bearing L quoted Table are be inshall 0.10 inch of theThe bolt head The runout ofinbolt the thread shall not should be by agreement between manufacturer and user and should be by agreement between manufacturer and user and 5.3 The nominal of the bolt shall be the increments but where alength 0.05 length increment isshall required this , which be the minimum bearing L exceed twice the pitch exceed twice the pitch should be identified as follows: 8� B, indicating a 6-32 UNC bolt identified as length follows: 8�manufacturer a 6-32 UNC bolt of of should be by agreement between and user and ,indicating which shall be the minimum bearing L clamping length, MB,min , less two thread bearing length 0.85 L, and E need to be bearing length 0.85 inches inches L, M Mof and E indicating need toshall bea adjusted adjusted should be identified as follows: 8� B, 6-32 UNC bolt of 5.3 The nominal length the bolt be the 5.3 The nominal length of the bolt shall be the minimum clamping length, M , less two thread pitches accordingly accordingly bearing length 0.85 inches L, MLand E, need to be adjusted which shall be the minimum bearing length which minimum length Lmin pitches min., in NOTE The bearing bearing lengths L quoted Table 3shall are inbe 0.10the inch accordingly minimum clamping length, M , less two thread minimum clamping length, Mincrement lessis3two increments wherelengths a 0.05 length required this NOTE Thebut bearing L quoted in ,Table are inthread 0.10 inch pitches should be bybut agreement between user and Screw threads increments where a 0.05 lengthmanufacturer increment isand required this pitches should be identified as follows: 8�manufacturer B, indicating aare 6-32 UNC bolt of byshall agreement between user and NOTE The bearing lengths L in Table 33and in 0.10 inch Screw threads The bolts have unified screw threads the NOTE The bearing lengths LMquoted quoted in Table are inof 0.10 inch The bolts shall have unified screw threads of the bearing length 0.85 inches L,length andB, E indicating need toisbe adjusted should be identified as follows: 8� a 6-32 UNC increments but where a 0.05 increment required this increments but where a 0.05 length increment is required thisbolt of form and fit specified in the latest edition of The shall have unified screw threads of and the form and specified latest of accordingly bearing length 0.85 inches L,in Mthe and E need edition to be adjusted and user shouldbolts be byfit agreement between manufacturer should be by agreement between manufacturer and user and BS A A and 100 accordingly BS 100 form fit specified in the latest edition should be as 8� indicating aa 6-32 should be identified identified as follows: follows: 8� B, B, indicating 6-32ofUNC UNC bolt bolt of of bearing length 0.85 inches L, M and E need to be adjusted BS A 100 After coating, the bolts shall be accepted by a thread bearing length 0.85 inches L, M and E need to be adjusted After coating, the bolts shall be accepted by a thread Screw threads accordingly accordingly gauge of basic basic sizebolts (class 3A) conforming to After coating, the shall accepted by gauge of size (class 3A)be conforming to a thread Screw threads The bolts shall have(class unified threadstoof the BS conforming BS 1580-1-2:1962 1580-1-2:1962 gauge of basic size 3A)screw The bolts shall screw threads of the The bolts shall havehave unified threads of the form and fit specified in unified the screw latest edition of BS 1580-1-2:1962 Screw threads form fitthreads that conform to latest BS 4Aedition 100:2003 form and specified in the of After BSScrew A and 100 fit The have unified screw threads of the protective finish has been applied, the bolt The bolts shall have unified screw threads ofthreads BS Abolts 100 shall Anti-corrosion treatment After coating, the bolts shall be accepted by athe thread form and fit specified in the latest edition of shall not exceed the basic size (maximum metal form and fit bolts specified inbe the latest edition of Anti-corrosion treatment All finished shall uniformly coated with After coating, the bolts shall be accepted by a thread All finished bolts shall be uniformly coated with gauge of basic size (class 3A) conforming to BS A condition) the thread size andA ofto fit BS A 100 100 cadmium in accordance BS 100 All finished bolts bewith uniformly coated with gauge of basic sizeshall (class 3A) conforming cadmium infor accordance with BS A class 100 BS 1580-1-2:1962 After coating, the cadmium in accordance with be BSaccepted A 100 by After coating, the bolts bolts shall shall be accepted by aa thread thread BS 1580-1-2:1962 gauge of basic size (class 3A) conforming to gauge of basic size (class 3A) conforming to Protective finish Hardness values treatment BS 1580-1-2:1962 BSAnti-corrosion 1580-1-2:1962 Hardness values Anti-corrosion treatment The hardness values ofbe finished boltscoated shall All bolts shall be shall coated with cadmium in with The hardness values of finished bolts shall All finished bolts uniformly be 255 min./321 max HB oruniformly 270 min./340 max HV accordance with Def Stan 03-19 or100 BS EN 2133. All finished bolts shall be coated with be 255 min./321 max HB or 270 min./340 HV cadmium in accordance with BS A The hardness values of finished bolts shall Anti-corrosion treatment treatment max cadmium in accordance BSmin./340 A 100 max HV be Anti-corrosion 255 min./321 max HB with or 270 All All finished finished bolts bolts shall shall be be uniformly uniformly coated coated with with Identification and Hardness values cadmium in accordance accordance withmarking BS A A 100 100 cadmium in with BS Hardness values Identification marking The bolts shall be identified in The bolts shallvalues be identified in accordance accordance with the the hardness ofand finished bolts shall with requirements specified in BS 3A 100:1991 clause bolts shall be identified in accordance with the The hardness values of finished bolts shall requirements specified BS270 3Amin./340 100:1991max clause be Hardness 255 min./321 max HBinor HV values Hardness values be 255 min./321 max HBinor HV requirements specified BS270 3Amin./340 100:1991max clause The hardness of bolts The hardness values values of finished finished bolts shall shall 10 Quality assurance procedure Identification and marking be 255 min./321 max HB or 270 min./340 be 255 min./321 max HB or 270 min./340 max max HV HV 10 Quality assurance Identification and marking The bolts shall conform to the the quality requirements The bolts shall conform to quality requirements be identified inprocedure accordance with the The bolts shall be marked in accordance with specified in BS A 100, 100, as appropriate to the method The bolts shall be identified in accordance with the specified in BS A as appropriate to the method requirements specified in BS 3A 100:1991 clause the requirements specified in BS 4A 100:2003, conform to the quality requirements Identification and marking Identification of manufacture requirements specified in appropriate BSmarking 3A would 100:1991 clause of manufacture Clause 8, in e.g A113-20C, which marked specified BS A 100, and as tobe the method The shall be in with of manufacture The bolts shallthread be identified identified in accordance accordance with the the on a bolts bolt with size 8-32 UNC and bearing 10 Quality assurance procedure requirements specified 100:1991 requirements specified in BS BS 3A 3A 100:1991 clause clause 8 length 2.0 inches in 10 The Quality bolts shall assurance conform to theprocedure quality requirements The bolts shall conform theprocedure qualitytorequirements specified in BSassurance A 100, asto appropriate the method 10 Quality 10 Quality procedure specified in BSassurance A 100, as appropriate to the method of manufacture The bolts Themanufacture bolts shall shall conform conform to to the the quality quality requirements requirements of specified in BS A 100, as appropriate specified in BS A 100, as appropriate to to the the method method of manufacture manufacture of 11 1 1 Max runout of thread = x pitch BS BS 4A 4A 113:1999 113:1999+A1:2012 D F (for ref only) L* length) (bearing B R rad 45 ° A U rad H Max runout of thread = x pitch D B J C F (for ref only) L* M* (bearing (clampinglength) length) G E* (overall length) U rad R rad Figure Ð Dimensions of bolts 45 ° A * For bearing length L, clamping length M and overall length E see Table H nsed Copy: Ms Mary Groom, Licensed British Copy: Standards Ms Mary Institution, Groom, British 24/05/2012 Standards 13:48,Institution, Uncontrolled 24/05/2012 Copy, (c) 13:48, The British Uncontrolled Standards Copy, Institution (c) The 2012 British Standards Institution 2012 BS BS 4A 4A 113:1999 113:1999+A1:2012 L Table Ð Materials for manufacture of bolts J BS No Material Application M* G For the BS S(clamping 154 S 154 length)2 % nickelchromiummanufacture of bolts E * molybdenum machined (overall length) steel Figure Ð Dimensions of147 bolts % nickelBS S 147 S For the M * For bearing length L, clamping length M and overall length E see Table chromiummanufacture of E molybdenum forged bolts steel Figure Ð Bearing length, Ð Materials manufacture BS STable 149 S1149 1.75 %for nickelFor theof bolts clamping length and overall L chromiummanufacture BS No Material Applicationof length of bolts molybdenum forged bolts BS S 154 S 154 2 % nickelFor the steel chromiummanufacture of molybdenum machined bolts steel C M E Figure Ð Bearing length, clamping length and overall length of bolts 2 BS S 147 S 147 % nickelchromiummolybdenum steel BS S 149 S 149 1.75 % nickelchromiummolybdenum steel For the manufacture of forged bolts For the manufacture of forged bolts 2013 © The British Standards Institution 2012 BSI 2010 BSI BSI 2010 2010 BSI 2010 BSI 2010 © The British Standards Institution 2013 2012 BSI 2010 head head portion portion head head head portion portion portion of ofofof of of ofofof ofboltbolt heat bolt bolt bolt heat heat heat heat chamfer chamfer chamfer chamfer chamfer head head head head head head headhead head head B B B BB D DD DD C C C CC U UU UU R R R RR G GG GG H HH H H Width Width Width Width Width J b J bJ bJJbb Depth Depth Depth Depth Depth in inin in inin inin in inin inin in inin inin in in in inin in inin inin in inin inin in inin inin in inin inin in in in inin in inin inin in inin inin in inin inin in inin inin in inin inin in inin inin in inin inin in inin inin in in ref ref only ref ref ref only only only only max max max max max min.min min max max max max max minmin min approx approx approx approx approx ref.ref ref ref ref max max max max max min.min min max max max max max min.min min min.min min max max max max max min.min min max max max max max ref onlyonly only only only F a F Fa aFF aa SlotSlot Slot Slot Slot a This a aThis aa This dimension This This dimension dimension dimension dimension is anisabsolute isanis an isabsolute an an absolute absolute absolute minimum minimum minimum minimum minimum associated associated associated associated associated withwith maximum with with with maximum maximum maximum maximum length length length Mlength length and MMand minimum M M and and and minimum minimum minimum minimum length length length E length length ItE.isE.Itnot E E ItisIt is It not intended is not is not intended not intended intended intended for use for foruse for for use use manufacturing for use formanufacturing for for manufacturing manufacturing manufacturing or inspection ororinspection or or inspection inspection inspection purposes purposes purposes purposes purposes b Tob be bTo bb To measured be To To bemeasured be be measured measured measured fromfrom the from from from top the thethe top of the top the top of top ofhead the of of thethe head the to head head head the totopoint the to to thethe point the point atpoint point which atatwhich at at which the which which slot the thethe slot the breaks slot slot slot breaks breaks through breaks breaks through through through through see see Figure see see Figure see Figure 1.Figure Figure 1.1 1 5/ 5in 55//UNF 5/16-24 UNF 0.3125-24 inUNF in in UNF UNF 0.312 UNF UNF 0.312 0.312 0.312 0.312 5 55 0.312 0.312 0.312 0.312 0.312 00.309 00.309 0.309 0.309 0.309 00.083 00.083 0.083 0.083 0.083 0.497 0.497 0.497 0.497 0.497 0.690 0.690 0.690 0.690 0.690 0.666 0.666 0.666 0.666 0.666 0.183 0.183 0.183 0.183 0.183 0.162 0.162 0.162 0.162 0.162 0.030 0.030 0.030 0.030 0.030 0.474 0.474 0.474 0.474 0.474 0.030 0.030 0.030 0.030 0.030 0.015 0.015 0.015 0.015 0.015 0.040 0.040 0.040 0.040 0.040 0.030 0.030 0.030 0.030 0.030 0.072 0.072 0.072 0.072 0.072 0.084 0.084 0.084 0.084 0.084 0.090 0.090 0.090 0.090 0.090 0.100 0.100 0.100 0.100 0.100 16 /16/16in 16 16 1/ in 1 1UNF 1/in 1/4-28 UNF 0.250-28 UNF in UNF UNF 0.250 UNF UNF 0.250 0.250 0.250 0.250 0 00 0.249 0.249 0.249 0.249 0.249 50.246 50.246 0.246 0.246 0.246 50.071 50.071 0.071 0.071 0.071 0.459 0.459 0.459 0.459 0.459 0.565 0.565 0.565 0.565 0.565 0.546 0.546 0.546 0.546 0.546 0.150 0.150 0.150 0.150 0.150 0.133 0.133 0.133 0.133 0.133 0.025 0.025 0.025 0.025 0.025 0.389 0.389 0.389 0.389 0.389 0.030 0.030 0.030 0.030 0.030 0.015 0.015 0.015 0.015 0.015 0.040 0.040 0.040 0.040 0.040 0.030 0.030 0.030 0.030 0.030 0.064 0.064 0.064 0.064 0.064 0.075 0.075 0.075 0.075 0.075 0.073 0.073 0.073 0.073 0.073 0.083 0.083 0.083 0.083 0.083 /4 /4in 4/4 in 0.190-32 UNF 10-32 UNF No No 10-32 No No 10-32 No 10-32 UNF 10-32 10-32 UNF UNF 0.190 UNF UNF 0.190 0.190 0.190 0.190 0 00 0.189 0.189 0.189 0.189 0.189 50.186 50.186 0.186 0.186 0.186 50.063 50.063 0.063 0.063 0.063 0.377 0.377 0.377 0.377 0.377 0.441 0.441 0.441 0.441 0.441 0.425 0.425 0.425 0.425 0.425 0.118 0.118 0.118 0.118 0.118 0.103 0.103 0.103 0.103 0.103 0.020 0.020 0.020 0.020 0.020 0.304 0.304 0.304 0.304 0.304 0.020 0.020 0.020 0.020 0.020 0.010 0.010 0.010 0.010 0.010 0.030 0.030 0.030 0.030 0.030 0.020 0.020 0.020 0.020 0.020 0.050 0.050 0.050 0.050 0.050 0.060 0.060 0.060 0.060 0.060 0.055 0.055 0.055 0.055 0.055 0.065 0.065 0.065 0.065 0.065 0.164-32 UNC 8-32 UNC No No 8-32 No No 8-32 No 8-32 UNC 8-32 8-32 UNC UNC 0.164 UNC UNC 0.164 0.164 0.164 0.164 0 00 0.163 0.163 0.163 0.163 0.163 50.160 50.160 0.160 0.160 0.160 50.063 50.063 0.063 0.063 0.063 0.327 0.327 0.327 0.327 0.327 0.378 0.378 0.378 0.378 0.378 0.364 0.364 0.364 0.364 0.364 0.102 0.102 0.102 0.102 0.102 0.088 0.088 0.088 0.088 0.088 0.015 0.015 0.015 0.015 0.015 0.255 0.255 0.255 0.255 0.255 0.020 0.020 0.020 0.020 0.020 0.010 0.010 0.010 0.010 0.010 0.030 0.030 0.030 0.030 0.030 0.020 0.020 0.020 0.020 0.020 0.045 0.045 0.045 0.045 0.045 0.054 0.054 0.054 0.054 0.054 0.046 0.046 0.046 0.046 0.046 0.056 0.056 0.056 0.056 0.056 0.138-32 UNC 06-32 UNC No No 6-32 No No 6-32 No 6-32 UNC 6-32 6-32 UNC UNC 0.138 UNC UNC 0.138 0.138 0.138 0.138 0 00 0.137 0.137 0.137 0.137 0.137 50.134 50.134 0.134 0.134 0.134 50.063 50.063 0.063 0.063 0.063 0.277 0.277 0.277 0.277 0.277 0.316 0.316 0.316 0.316 0.316 0.303 0.303 0.303 0.303 0.303 0.086 0.086 0.086 0.086 0.086 0.074 0.074 0.074 0.074 0.074 0.010 0.010 0.010 0.010 0.010 0.205 0.205 0.205 0.205 0.205 0.015 0.015 0.015 0.015 0.015 0.005 0.005 0.005 0.005 0.005 0.030 0.030 0.030 0.030 0.030 0.020 0.020 0.020 0.020 0.020 0.039 0.039 0.039 0.039 0.039 0.048 0.048 0.048 0.048 0.048 0.038 0.038 0.038 0.038 0.038 0.048 0.048 0.048 0.048 0.048 in inin in in A A AA max max max max max min.min min A Table Table Table Table Table 2Ð 22Ð Dimensions 22 ÐÐ Ð Dimensions Dimensions Dimensions Dimensions of of bolts ofof of bolts bolts bolts bolts Nominal Nominal Nominal Nominal Nominal sizesize size size size Decimal Decimal Decimal Decimal Decimal Diameter Diameter Diameter Diameter Diameter of ofofof of3 2 223 Min Diameter Diameter of Thickness of Cylindrical 233 3Min.Min Min Min.Diameter Diameter Diameter of ofofThickness of Thickness Thickness Thickness of ofof Cylindrical ofCylindrical Cylindrical Cylindrical Radius Radius Radius Radius Radius Radius Radius Radius Radius Radius under under under under under Depth Depth Depth of Depth Depth ofofof of equivalent equivalent equivalent equivalent equivalent plain plain plain portion plain plain portion portion portion portion pitch pitch length length ofofof head head pitch pitch pitch length length of length of head head head Decimal Nominal Thread ofnominal of of nominal nominal nominal ofofshank of of shank shank shank screwed screwed screwed screwed screwed ofthread equivalent of of nominal size of shank runout size size size portion portion portion portion of ofofof of nominal thread sizesize (2 × portion shank shank shank shank shank size pitch) Licensed Licensed Licensed Licensed Licensed Copy: Copy: Copy: Copy: Copy: MsMs Mary Ms Ms Ms Mary Mary Mary Groom, Mary Groom, Groom, Groom, Groom, British British British British British Standards Standards Standards Standards Standards Institution, Institution, Institution, Institution, Institution, 24/05/2012 24/05/2012 24/05/2012 24/05/2012 24/05/2012 13:48, 13:48, 13:48, 13:48, 13:48, Uncontrolled Uncontrolled Uncontrolled Uncontrolled Uncontrolled Copy, Copy, Copy, Copy, Copy, (c) (c) The (c) (c) (c) The The British The The British British British British Standards Standards Standards Standards Standards Institution Institution Institution Institution Institution 2012 2012 2012 2012 2012 BS 4A 113:1999 BS BS 4A 4A 113:1999 113:1999 BS 4A 113:1999 BS 4A 113:1999+A1:2012 3 3 Licensed Copy: Ms Mary Groom, British Standards Institution, 24/05/2012 13:48, Uncontrolled Copy, (c) The British Standards Institution 2012 BS BS 4A 4A 113:1999 113:1999+A1:2012 Table Ð Bearing length L, clamping length M and overall length E of bolts Part no No 6-32 UNC La M +0 20.03 E +0.04 20 Part no No 8-32 UNC La M +0 20.03 E +0.04 20 Part no No 10-32 UNF La M +0 20.03 E +0.04 20 �B 1B 2B 3B 4B 5B in 0.05 0.1 0.2 0.3 0.4 0.5 in 0.143 0.193 0.293 0.393 0.493 0.593 in 0.45 0.50 0.60 0.70 0.80 0.90 �C 1C 2C 3C 4C 5C in 0.05 0.1 0.2 0.3 0.4 0.5 in 0.143 0.193 0.293 0.393 0.493 0.593 in 0.50 0.55 0.65 0.75 0.85 0.95 �D 1D 2D 3D 4D 5D in 0.05 0.1 0.2 0.3 0.4 0.5 in 0.143 0.193 0.293 0.393 0.493 0.593 in 0.55 0.60 0.70 0.80 0.90 1.00 6B 7B 8B 9B 10B 0.6 0.7 0.8 0.9 1.0 0.693 0.793 0.893 0.993 1.093 1.00 1.10 1.20 1.30 1.40 6C 7C 8C 9C 10C 0.6 0.7 0.8 0.9 1.0 0.693 0.793 0.893 0.993 1.093 1.05 1.15 1.25 1.35 1.45 6D 7D 8D 9D 10D 0.6 0.7 0.8 0.9 1.0 0.693 0.793 0.893 0.993 1.093 1.10 1.20 1.30 1.40 1.50 11B 12B 13B 14B 15B 1.1 1.2 1.3 1.4 1.5 1.193 1.293 1.393 1.493 1.593 1.50 1.60 1.70 1.80 1.90 11C 12C 13C 14C 15C 1.1 1.2 1.3 1.4 1.5 1.193 1.293 1.393 1.493 1.593 1.55 1.65 1.75 1.85 1.95 11D 12D 13D 14D 15D 1.1 1.2 1.3 1.4 1.5 1.193 1.293 1.393 1.493 1.593 1.60 1.70 1.80 1.90 2.00 16B 17B 18B 1.6 1.7 1.8 1.693 1.793 1.893 2.00 2.10 2.20 16C 17C 18C 1.6 1.7 1.8 1.693 1.793 1.893 2.05 2.15 2.25 16D 17D 18D 1.6 1.7 1.8 1.693 1.793 1.893 2.10 2.20 2.30 19B 20B 1.9 2.0 1.993 2.093 2.30 2.40 19C 20C 1.9 2.0 1.993 2.093 2.35 2.45 19D 20D 1.9 2.0 1.993 2.093 2.40 2.50 21B 2.1 2.193 2.50 21C 2.1 2.193 2.55 21D 2.1 2.193 2.60 22B 23B 24B 25B 2.2 2.3 2.4 2.5 2.293 2.393 2.493 2.593 2.60 2.70 2.80 2.90 22C 23C 24C 25C 2.2 2.3 2.4 2.5 2.293 2.393 2.493 2.593 2.65 2.75 2.85 2.95 22D 23D R24DS 25D 2.2 2.3 2.4 2.5 2.293 2.393 2.493 2.593 2.70 2.80 R2.90S 3.00 26B 27B 28B 2.6 2.7 2.8 2.693 2.793 2.893 3.00 3.10 3.20 26C 27C 28C 2.6 2.7 2.8 2.693 2.793 2.893 3.05 3.15 3.25 26D 27D 28D 2.6 2.7 2.8 2.693 2.793 2.893 3.10 3.20 3.30 4 © The British Standards Institution 2013 2012 BSI 2010 Licensed Copy: Ms Mary Groom, British Standards Institution, 24/05/2012 13:48, Uncontrolled Copy, (c) The British Standards Institution 2012 BS 4A 113:1999 BS 4A 113:1999+A1:2012 Table Ð Bearing length L, clamping length M and overall length E of bolts (continued) Part no No 6-32 UNC La M +0 20.03 E +0.04 20 Part no No 8-32 UNC La M +0 20.03 E +0.04 20 Part no No 10-32 UNF La M +0 20.03 E +0.04 20 29B 30B 31B 32B 33B in 2.9 3.0 3.1 3.2 3.3 in 2.993 3.093 3.193 3.293 3.393 in 3.30 3.40 3.50 3.60 3.70 29C 30C 31C 32C 33C in 2.9 3.0 3.1 3.2 3.3 in 2.993 3.093 3.193 3.293 3.393 in 3.35 3.45 3.55 3.65 3.75 29D 30D 31D 32D 33D in 2.9 3.0 3.1 3.2 3.3 in 2.993 3.093 3.193 3.293 3.393 in 3.40 3.50 3.60 3.70 3.80 34B 35B 36B 37B 38B 3.4 3.5 3.6 3.7 3.8 3.493 3.593 3.693 3.793 3.893 3.80 3.90 4.00 4.10 4.20 34C 35C 36C 37C 38C 3.4 3.5 3.6 3.7 3.8 3.493 3.593 3.693 3.793 3.893 3.85 3.95 4.05 4.15 4.25 34D 35D 36D 37D 38D 3.4 3.5 3.6 3.7 3.8 3.493 3.593 3.693 3.793 3.893 3.90 4.00 4.10 4.20 4.30 39B 40B 41B 42B 43B 3.9 4.0 4.1 4.2 4.3 3.993 4.093 4.193 4.293 4.393 4.30 4.40 4.50 4.60 4.70 39C 40C 41C 42C 43C 3.9 4.0 4.1 4.2 4.3 3.993 4.093 4.193 4.293 4.393 4.35 4.45 4.55 4.65 4.75 39D 40D 41D 42D 43D 3.9 4.0 4.1 4.2 4.3 3.993 4.093 4.193 4.293 4.393 4.40 4.50 4.60 4.70 4.80 44B 45B 4.4 4.5 4.493 4.593 4.80 4.90 44C 45C 4.4 4.5 4.493 4.593 4.85 4.95 44D 45D 4.4 4.5 4.493 4.593 4.90 5.00 NOTE Bolts with those dimensions listed below the double line may not be readily available in large quantities because of limitations in manufacture for forging a See 5.3 © The British Standards Institution 2013 2012 BSI 2010 5 Licensed Copy: Ms Mary Groom, British Standards Institution, 24/05/2012 13:48, Uncontrolled Copy, (c) The British Standards Institution 2012 BS BS 4A 4A 113:1999 113:1999+A1:2012 Table Ð Bearing length L, clamping length M and overall length E of bolts (continued) ï in UNF Part no 5/ 16 M La +0 20.04 �E 1E 2E 3E 4E 5E in 0.05 0.1 0.2 0.3 0.4 0.5 in 0.151 0.201 0.301 0.401 0.501 0.601 6E 7E 8E 9E 10E 0.6 0.7 0.8 0.9 1.0 11E 12E 13E 14E 15E E in UNF La Part no +0.04 20 M E +0 20.03 +0.04 20 0.65 0.70 0.80 0.90 1.00 1.10 in �G 1G 2G 3G 4G 5G in 0.05 0.1 0.2 0.3 0.4 0.5 in 0.163 0.213 0.313 0.413 0.513 0.613 0.70 0.75 0.85 0.95 1.05 1.15 0.701 0.801 0.901 1.001 1.101 1.20 1.30 1.40 1.50 1.60 6G 7G 8G 9G 10G 0.6 0.7 0.8 0.9 1.0 0.713 0.813 0.913 1.013 1.113 1.25 1.35 1.45 1.55 1.65 1.1 1.2 1.3 1.4 1.5 1.201 1.301 1.401 1.501 1.601 1.70 1.80 1.90 2.00 2.10 11G 12G 13G 14G 15G 1.1 1.2 1.3 1.4 1.5 1.213 1.313 1.413 1.513 1.613 1.75 1.85 1.95 2.05 2.15 16E 17E 18E 19E 20E 1.6 1.7 1.8 1.9 2.0 1.701 1.801 1.901 2.001 2.101 2.20 2.30 2.40 2.50 2.60 16G 17G 18G 19G 20G 1.6 1.7 1.8 1.9 2.0 1.713 1.813 1.913 2.013 2.113 2.25 2.35 2.45 2.55 2.65 21E 22E 23E 24E 2.1 2.2 2.3 2.4 2.201 2.301 2.401 2.501 2.70 2.80 2.90 3.00 21G 22G 23G 24G 2.1 2.2 2.3 2.4 2.213 2.313 2.413 2.513 2.75 2.85 2.95 3.05 25E 2.5 2.601 3.10 25G 2.5 2.613 3.15 26E 27E 2.6 2.7 2.701 2.801 3.20 3.30 26G 27G 2.6 2.7 2.713 2.813 3.25 3.35 28E 29E 30E 2.8 2.9 3.0 2.901 3.001 3.101 3.40 3.50 3.60 28G 29G 30G 2.8 2.9 3.0 2.913 3.013 3.113 3.45 3.55 3.65 6 © The British Standards Institution 2013 2012 BSI 2010 Licensed Copy: Ms Mary Groom, British Standards Institution, 24/05/2012 13:48, Uncontrolled Copy, (c) The British Standards Institution 2012 BS 4A 113:1999 BS 4A 113:1999+A1:2012 Table Ð Bearing length L, clamping length M and overall length E of bolts (continued) ï in UNF Part no 5/ 16 M La +0 R20.03S 31E 32E 33E 34E 35E in 3.1 3.2 3.3 3.4 3.5 in 3.201 3.301 3.401 3.501 3.601 36E 37E 38E 39E 40E 3.6 3.7 3.8 3.9 4.0 41E 42E 43E 44E 45E 46E 47E 48E 49E 50E E in UNF La Part no +0.04 20 M E +0 20.03 +0.04 20 3.70 3.80 3.90 4.00 4.10 in 31G 32G 33G 34G 35G in 3.1 3.2 3.3 3.4 3.5 in 3.213 3.313 3.413 3.513 3.613 3.75 3.85 3.95 4.05 4.15 3.701 3.801 3.901 4.001 4.101 4.20 4.30 4.40 4.50 4.60 36G 37G 38G 39G 40G 3.6 3.7 3.8 3.9 4.0 3.713 3.813 3.913 4.013 4.113 4.25 4.35 4.45 4.55 4.65 4.1 4.2 4.3 4.4 4.5 4.201 4.301 4.401 4.501 4.601 4.70 4.80 4.90 5.00 5.10 41G 42G 43G 44G 45G 4.1 4.2 4.3 4.4 4.5 4.213 4.313 4.413 4.513 4.613 4.75 4.85 4.95 5.05 5.15 4.6 4.7 4.8 4.9 5.0 4.701 4.801 4.901 5.001 5.101 5.20 5.30 5.40 5.50 5.60 46G 47G 48G 49G 50G 4.6 4.7 4.8 4.9 5.0 4.713 4.813 4.913 5.013 5.113 5.25 5.35 5.45 5.55 5.65 NOTE Bolts with those dimensions listed below the double line may not be readily available in large quantities because of limitations in manufacture for forging a See 5.3 © The British Standards Institution 2013 2012 BSI 2010 7 Licensed Copy: Ms Mary Groom, British Standards Institution, 24/05/2012 13:48, Uncontrolled Copy, (c) The British Standards Institution 2012 BS BS 4A 4A 113:1999 113:1999 +A1:2012 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI Ð British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions It is the constant aim of BSI to improve the quality of our products and services We would be grateful if anyone finding an 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