BRITISH STANDARD AEROSPACE SERIES BS A 310 1995 ISO 3186 1994 Bolts, large bihexagonal head, normal shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes 12[.]
Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 03: 33: 09 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BRITIS H S TAND ARD AE RO S PAC E S E RIE S BS A : 995 IS O 86: 994 Bolts, large b ihexagonal head, normal shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes MPa to 80 Mpa — D imensions Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 03: 33: 09 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS A 310:1995 Committees responsible for this British Standard The p rep aration of this Britis h S tandard was entrus ted to Technical C ommittee AC E /1 , Aerosp ace fas teners and fas tening s ystems , up on which the following b odies were rep res ented: British Indus trial Fasteners Federation Minis try of D efence S ociety of Britis h Aeros p ace C omp anies Ltd The Ass ociation of E lectronics , Telecommunications and Bus iness E quip ment Industries This Britis h S tandard, having b een p rep ared under the direction of the E ngineering S ector Board, was p ub lis hed under the authority of the S tandards Board and comes into effect on Amendments issued since publication May 995 © BS I 8- 9 The following BS I references relate to the work on this s tandard: C om mittee reference AC E /1 D raft for comment /845 D C ISBN 580 24069 X Amd No D ate C omments Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 03: 33: 09 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS A 310:1995 Contents Page Committees responsib le National foreword ii Scope Normative references C onfiguration and dimensions Figure Table List of references © BSI 08- 999 Inside front cover Inside back cover i Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 03: 33: 09 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS A 31 0:1 995 National foreword This British Standard has been prepared by Technical Committee ACE/1 It is identical with ISO 31 86: 994, Aeros p ace — Bolts , large b ihexagonal head, no rm al shank, sho rt o r m edium length MJ threads, m etallic m aterial, coated or unco ated, strength classes 250 MPa to 800 MPa — Dim ensions, published by the International Organization for Standardization (ISO) Cross-references International Standard C orresponding British Standard ISO 286- 2: 988 BS EN 20286 Part 2: 992 ISO system of lim its and fits Tab les of standard to lerance grades and lim it deviatio ns for holes and shafts (Identical) ISO 3353: 992 BS 2A 231 : 993 Rolled threads for b olts Lead and runout req uirem ents (Identical) ISO 5855- 2: 988 BS 6293 Aerosp ace — MJ threads Part 2: 994 Lim it dim ensions for b olts and nuts (Identical) ISO 791 3: 994 BS 2A 296: 995 Bo lts and screw s , m etric — To lerances o f fo rm and p os ition (Identical) The Technical Committee has reviewed the provisions of ISO 4095: 978, to which normative reference is made in the text, and has decided that they are acceptable for use in conj unction with this standard A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages to 4, an inside back cover and a back cover This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover ii © BSI 08- 999 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 03: 33: 09 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS A 310:1995 Scope IS O 86- : 88, ISO s ystem of lim its and fits — Part 2: Tab les o f standard tolerance grades and This International S tandard sp ecifies the lim it deviations for holes and shafts dimens ions of large b ihexagonal head b olts, with clos e or large tolerance normal shank, and s hort or medium length MJ threads , in metallic material, IS O 3 : 992 , Aero sp ace — Rolled threads fo r b olts — Lead and runout req uirem ents coated or uncoated, with s trength IS O 4095 : 978, Fasteners fo r aerosp ace clas ses MPa to 80 MPa construction — Bi- hexago nal w renching configuration It is intended for the drawing up of aerosp ace IS O 85 - : 88, Aeros p ace — MJ threads — p roduct s tandards Part 2: Lim it dim ensions for b olts and nuts Normative references IS O 91 : 994, Aeros p ace — Bolts and screw s, The following s tandards contain p rovis ions which, through reference in this text, constitute p rovis ions of this International S tandard At the time of p ub lication, the editions indicated were valid All s tandards are sub j ect to revis ion, and p arties to m etric — Tolerances o f fo rm and p os ition Configuration and dimensions S ee Figure and Tab le D imensions and tolerances are exp res s ed in millimetres They are agreements b ased on this International S tandard are encouraged to inves tigate the p os s ib ility of ap p licab le after any s urface coating, b ut b efore the ap p lication of any lub ricant ap p lying the mos t recent editions of the s tandards Tolerances of form and p osition are sp ecified in indicated b elow Memb ers of IE C and IS O maintain IS O 79 registers of currently valid International S tandards Figure © BS I 8- 99 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 03: 33: 09 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS A : 995 Tab le D1 C o ate d b o lts D iame te r co d e a Thre ad no m 60 70 80 00 20 40 60 80 200 220 240 MJ5 × 0,8 – 4h6h MJ6 × – 4h6h MJ7 × – 4h6h MJ8 × – 4h6h MJ10 × 1,25 – 4h6h MJ12 × 1,25 – 4h6h MJ14 × 1,5 – 4h6h MJ16 × 1,5 – 4h6h MJ18 × 1,5 – 4h6h MJ20 × 1,5 – 4h6h MJ22 × 1,5 – 4h6h MJ24 × – 4h6h 10 12 14 16 18 20 22 24 b o lts to l clo se 050 Unco ate d large clo se D4 D5 large +1 ± 0,5 min 2,5 3,4 3,2 4,2 –0,013 –0,038 –0,020 –0,045 D3 D6 D7 D8 to l –0,010 –0,035 –0,016 –0,041 D2 h12 b f7 b 3,9 4,5 6,1 7,7 h12 b 10,3 11,9 14,5 16 18,6 21,2 5,2 6,2 7,9 9,8 11,5 13,5 15,5 17,5 19,5 20,9 max H13 b H13 b 6,8 9,5 10,3 7,8 11 11,8 8,8 12,5 13,3 1,4 9,8 14 14,8 11,8 17,3 18,3 13,7 20,9 22 16,7 23,9 25 18,6 27,4 28,5 1,6 21,6 30,4 31,5 23,6 33,4 34,5 26,6 36,4 37,5 29,6 39,4 40,5 1,5 1,9 2,4 3,8 © BSI 08-1999 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 03: 33: 09 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS A 31 0:1 995 Table H K h15 b Diameter L1 c code L2 L3 Thread Thread short 050 060 070 080 00 20 40 60 80 200 220 240 a In 1,5 1,7 1,9 2,1 2,5 2,9 3,3 3,7 4,1 4,5 4,9 5,3 7,4 8,4 9,2 9,8 11,6 12,9 14,3 15,8 17,1 18,6 19,9 21,9 to 50 to 60 to 70 to 80 to 100 to 120 to 140 to 160 to 180 10 to 200 11 to 220 12 to 240 250 10 11 11,5 14,5 16 19 20,5 22,5 24,5 26 29,5 R1 S T medium strength class (MPa) ± 0,2 P 12 14 15 16,5 20,5 22,5 26 28,5 31 33,5 36 41 dash number short medium > 250 12,5 15 16 17 21 23,5 27,5 30 33 35,5 38 43,5 Wrenching 7,5 8,5 9,5 7,5 10,5 13 10 14,5 12 17 13 18,5 14,5 21 15 22,5 16 24 17,5 26,5 5,3 6,1 6,7 7,2 8,5 9,6 10,8 12,4 13,9 15,3 16,8 18,3 – 0,2 + 0,4 0,8 3,3 3,8 4,2 4,6 5,5 6,4 7,1 8,4 9,4 10,5 11,6 12,7 1,2 1,4 1,8 d 2,8 3,5 3,8 3,9 4,2 4,5 5,1 5,3 6,1 6,6 7,4 8,2 07 08 09 10 12 14 17 19 22 24 27 30 conformity with ISO 5855-2, except for the maximum major diameter “d” of bolts with a close tolerance on D1 , which shall be D – 0,025 equal to b See ISO 286-2 c Increments: for L1 u 30 for 30 < L u 100 for L1 > 100 If greater lengths are required, they shall be chosen using these increments d In conformity with ISO 4095 over T © BSI 08-1999 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 03: 33: 09 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI blank Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 03: 33: 09 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI List of references See national foreword © BSI 08- 999 BS A 310:1995 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 03: 33: 09 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS A 310:1995 ISO 3186:1994 BSI — British Standards Institution BS I is the indep endent national b ody res p ons ib le for p rep aring Britis h S tandards It p res ents the UK view on s tandards in E urop e and at the international level It is incorp orated b y Royal C harter Revisions Britis h S tandards are up dated b y amendment or revis ion Us ers of Britis h S tandards should make s ure that they p oss es s the latest amendments or editions It is the constant aim of BS I to imp rove the quality of our p 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