Microsoft Word C051386e doc Reference number ISO 725 2009(E) © ISO 2009 INTERNATIONAL STANDARD ISO 725 Second edition 2009 04 15 ISO inch screw threads — Basic dimensions Filetages ISO en inches — Dim[.]
ISO 725 INTERNATIONAL STANDARD Second edition 2009-04-15 ISO inch screw threads — Basic dimensions Filetages ISO en inches — Dimensions de base Reference number ISO 725:2009(E) `,,```,,,,````-`-`,,`,,`,`,,` - Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS Not for Resale © ISO 2009 ISO 725:2009(E) PDF disclaimer This PDF file may contain embedded typefaces In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy The ISO Central Secretariat accepts no liability in this area Adobe is a trademark of Adobe Systems Incorporated Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing Every care has been taken to ensure that the file is suitable for use by ISO member bodies In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below COPYRIGHT PROTECTED DOCUMENT © ISO 2009 `,,```,,,,````-`-`,,`,,`,`,,` - All rights reserved Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester ISO copyright office Case postale 56 • CH-1211 Geneva 20 Tel + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland ii Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS © ISO 2009 – All rights reserved Not for Resale ISO 725:2009(E) Contents Page Foreword iv Scope Symbols Basic dimensions Bibliography 14 `,,```,,,,````-`-`,,`,,`,`,,` - © ISO 2009 – All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS Not for Resale iii ISO 725:2009(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work of preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part The main task of technical committees is to prepare International Standards Draft International Standards adopted by the technical committees are circulated to the member bodies for voting Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights ISO shall not be held responsible for identifying any or all such patent rights ISO 725 was prepared by Technical Committee ISO/TC 1, Screw threads `,,```,,,,````-`-`,,`,,`,`,,` - This second edition results from the reinstatement of ISO 725:1978, which was withdrawn in 2000 and with which it is technically identical iv Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS © ISO 2009 – All rights reserved Not for Resale INTERNATIONAL STANDARD ISO 725:2009(E) ISO inch screw threads — Basic dimensions Scope This International Standard specifies the basic dimensions, in inches, of ISO inch screw threads in accordance with ISO 263 The values refer to the basic profile in accordance with ISO 68-2 Symbols D basic major diameter of internal thread (nominal diameter) d basic major diameter of external thread (nominal diameter) D2 basic pitch diameter of internal thread d2 basic pitch diameter of external thread D1 basic minor diameter of internal thread d1 basic minor diameter of external thread H height of fundamental triangle n number of threads per inch (25,4 mm) `,,```,,,,````-`-`,,`,,`,`,,` - © ISO 2009 – All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS Not for Resale ISO 725:2009(E) Basic dimensions Dimensions shall be in accordance with Figure and given in Table The values of D2, d2, D1 and d1 have been calculated from the following equations and rounded, in Table 1, to the fourth decimal place: 0,649 519 H = D− n d2 = d − 2× 0,649 519 H =d− n D1 = D − × 1,082 532 H = D− n d1 = d − × `,,```,,,,````-`-`,,`,,`,`,,` - D2 = D − × 1,082 532 H =d− n where H = 0,866 025 40 n a Pitch, P = 1/n Figure — Basic dimensions Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS © ISO 2009 – All rights reserved Not for Resale ISO 725:2009(E) Size Major diameter Number of threads per inch D, d n Thread series in No 0,060 No 0,073 No 0,086 No 0,099 No 0,112 No 0,125 No 0,138 No 0,164 No 10 0,190 No 12 1/4 5/16 3/8 0,216 0,250 0,312 0,375 Minor diameter D2, d2 D1, d1 in in 80 UNF 0,051 0,046 64 UNC 0,062 0,056 72 UNF 0,064 0,058 56 UNC 0,074 0,066 64 UNF 0,075 0,069 48 UNC 0,085 0,076 56 UNF 0,087 0,079 40 UNC 0,095 0,084 48 UNF 0,098 0,089 40 UNC 0,108 0,097 44 UNF 0,110 0,100 32 UNC 0,117 0,104 40 UNF 0,121 0,110 32 UNC 0,143 0,130 36 UNF 0,146 0,133 24 UNC 0,162 0,144 32 UNF 0,169 0,156 24 UNC 0,188 0,170 28 UNF 0,192 0,177 32 UNEF 0,195 0,182 20 UNC 0,217 0,195 28 UNF 0,226 0,211 32 UNEF 0,229 0,216 18 UNC 0,276 0,252 20 UN 0,280 0,258 24 UNF 0,285 0,267 28 UN 0,289 0,273 32 UNEF 0,292 0,278 16 UNC 0,334 0,307 20 UN 0,342 0,320 24 UNF 0,347 0,329 28 UN 0,351 0,336 32 UNEF 0,354 0,341 © ISO 2009 – All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS Pitch diameter `,,```,,,,````-`-`,,`,,`,`,,` - Table — Basic dimensions Not for Resale ISO 725:2009(E) Table (continued) Size Major diameter Number of threads per inch D, d n Thread series in 7/16 `,,```,,,,````-`-`,,`,,`,`,,` - 1/2 9/16 5/8 11/16 0,437 0,500 0,562 0,625 0,687 Minor diameter D2, d2 D1, d1 in in 14 UNC 0,391 0,360 16 UN 0,396 0,369 20 UNF 0,405 0,383 28 UNEF 0,414 0,398 32 UN 0,417 0,403 13 UNC 0,450 0,416 16 UN 0,459 0,432 20 UNF 0,467 0,445 28 UNEF 0,476 0,461 32 UN 0,479 0,466 12 UNC 0,508 0,472 16 UN 0,521 0,494 18 UNF 0,526 0,502 20 UN 0,530 0,508 24 UNEF 0,535 0,517 28 UN 0,539 0,523 32 UN 0,542 0,528 11 UNC 0,566 0,526 12 UN 0,570 0,534 16 UN 0,584 0,557 18 UNF 0,588 0,564 20 UN 0,592 0,570 24 UNEF 0,597 0,579 28 UN 0,601 0,586 32 UN 0,604 0,591 12 UN 0,633 0,597 16 UN 0,646 0,619 20 UN 0,655 0,633 24 UNEF 0,660 0,642 28 UN 0,664 0,648 32 UN 0,667 0,653 Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS Pitch diameter © ISO 2009 – All rights reserved Not for Resale ISO 725:2009(E) Table (continued) Size Major diameter Number of threads per inch D, d n Thread series in 3/4 13/16 7/8 15/16 `,,```,,,,````-`-`,,`,,`,`,,` - 1 1/16 0,750 0,812 0,875 0,937 1,000 1,062 Minor diameter D2, d2 D1, d1 in in 10 UNC 0,685 0,641 12 UN 0,695 0,659 16 UNF 0,709 0,682 20 UNEF 0,717 0,695 28 UN 0,726 0,711 32 UN 0,729 0,716 12 UN 0,758 0,722 16 UN 0,771 0,744 20 UNEF 0,780 0,758 28 UN 0,789 0,773 32 UN 0,792 0,778 UNC 0,802 0,754 12 UN 0,820 0,784 14 UNF 0,828 0,797 16 UN 0,834 0,807 20 UNEF 0,842 0,820 28 UN 0,851 0,836 32 UN 0,854 0,841 12 UN 0,883 0,847 16 UN 0,896 0,869 20 UNEF 0,905 0,883 28 UN 0,914 0,898 32 UN 0,917 0,903 UNC 0,918 0,864 12 UNF 0,945 0,909 16 UN 0,959 0,932 20 UNEF 0,967 0,945 28 UN 0,976 0,961 32 UN 0,979 0,966 UN 0,981 0,927 12 UN 1,008 0,972 16 UN 1,021 0,994 18 UNEF 1,026 1,002 20 UN 1,030 1,008 28 UN 1,039 1,023 © ISO 2009 – All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS Pitch diameter Not for Resale ISO 725:2009(E) Table (continued) Size Major diameter Number of threads per inch D, d n Thread series in 1/8 3/16 1/4 5/16 3/8 1,125 1,187 1,250 1,312 1,375 Pitch diameter Minor diameter D2, d2 D1, d1 in in UNC 1,032 0,970 UN 1,043 0,989 12 UNF 1,070 1,034 16 UN 1,084 1,057 18 UNEF 1,088 1,064 20 UN 1,092 1,070 28 UN 1,101 1,086 UN 1,106 1,052 12 UN 1,133 1,097 16 UN 1,146 1,119 18 UNEF 1,151 1,127 20 UN 1,155 1,133 28 UN 1,164 1,148 UNC 1,157 1,095 UN 1,168 1,114 12 UNF 1,195 1,159 16 UN 1,209 1,182 18 UNEF 1,213 1,189 20 UN 1,217 1,195 28 UN 1,226 1,211 UN 1,231 1,177 12 UN 1,258 1,222 16 UN 1,271 1,244 18 UNEF 1,276 1,252 20 UN 1,280 1,258 28 UN 1,289 1,273 UNC 1,266 1,194 UN 1,293 1,239 12 UNF 1,320 1,284 16 UN 1,334 1,307 18 UNEF 1,338 1,314 20 UN 1,342 1,320 28 UN 1,351 1,336 `,,```,,,,````-`-`,,`,,`,`,,` - Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS © ISO 2009 – All rights reserved Not for Resale ISO 725:2009(E) Size Major diameter Number of threads per inch D, d n Thread series in 7/16 1/2 9/16 5/8 11/16 1,437 1,500 1,562 1,625 1,687 Minor diameter D2, d2 D1, d1 in in UN 1,329 1,257 UN 1,356 1,302 12 UN 1,383 1,347 16 UN 1,396 1,369 18 UNEF 1,401 1,377 20 UN 1,405 1,383 28 UN 1,414 1,398 UNC 1,391 1,319 UN 1,418 1,364 12 UNF 1,445 1,409 16 UN 1,459 1,432 18 UNEF 1,463 1,439 20 UN 1,467 1,445 28 UN 1,476 1,461 UN 1,454 1,382 UN 1,481 1,427 12 UN 1,508 1,472 16 UN 1,521 1,494 18 UNEF 1,526 1,502 20 UN 1,530 1,508 UN 1,516 1,444 UN 1,543 1,489 12 UN 1,570 1,534 16 UN 1,584 1,557 18 UNEF 1,588 1,564 20 UN 1,592 1,570 UN 1,579 1,507 UN 1,606 1,552 12 UN 1,633 1,597 16 UN 1,646 1,619 18 UNEF 1,651 1,627 20 UN 1,655 1,633 © ISO 2009 – All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS Pitch diameter `,,```,,,,````-`-`,,`,,`,`,,` - Table (continued) Not for Resale ISO 725:2009(E) Size Major diameter Number of threads per inch D, d n Thread series in 3/4 13/16 7/8 15/16 2 1/8 1,750 1,812 1,875 1,937 2,000 2,125 Minor diameter D2, d2 D1, d1 in in UNC 1,620 1,533 UN 1,641 1,569 UN 1,668 1,614 12 UN 1,695 1,659 16 UN 1,709 1,682 20 UN 1,717 1,695 UN 1,704 1,632 UN 1,731 1,677 12 UN 1,758 1,722 16 UN 1,771 1,744 20 UN 1,780 1,758 UN 1,766 1,694 UN 1,793 1,739 12 UN 1,820 1,784 16 UN 1,834 1,807 20 UN 1,842 1,820 UN 1,829 1,757 UN 1,856 1,802 12 UN 1,883 1,847 16 UN 1,896 1,869 20 UN 1,905 1,883 4 1/2 UNC 1,855 1,759 UN 1,891 1,819 UN 1,918 1,864 12 UN 1,945 1,909 16 UN 1,959 1,932 20 UN 1,967 1,945 UN 2,016 1,944 UN 2,043 1,989 12 UN 2,070 2,034 16 UN 2,084 2,057 20 UN 2,092 2,070 Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS Pitch diameter © ISO 2009 – All rights reserved Not for Resale `,,```,,,,````-`-`,,`,,`,`,,` - Table (continued) ISO 725:2009(E) Size Major diameter Number of threads per inch D, d n Thread series in 1/4 3/8 1/2 5/8 3/4 7/8 2,250 2,375 2,500 2,625 2,750 2,875 Minor diameter D2, d2 D1, d1 in in 1/2 UNC 2,105 2,0094 UN 2,141 2,0696 UN 2,168 2,1147 12 UN 2,195 2,1598 16 UN 2,209 2,1823 20 UN 2,217 2,1959 UN 2,266 2,1946 UN 2,293 2,2397 12 UN 2,320 2,2848 16 UN 2,334 2,3073 20 UN 2,342 2,3209 UNC 2,337 2,229 UN 2,391 2,319 UN 2,418 2,364 12 UN 2,445 2,409 16 UN 2,459 2,432 20 UN 2,467 2,445 UN 2,462 2,354 UN 2,516 2,444 UN 2,543 2,489 12 UN 2,570 2,534 16 UN 2,584 2,557 20 UN 2,592 2,570 UNC 2,587 2,479 UN 2,641 2,569 UN 2,668 2,614 12 UN 2,695 2,659 16 UN 2,709 2,682 20 UN 2,717 2,695 UN 2,712 2,604 UN 2,766 2,694 UN 2,793 2,739 12 UN 2,820 2,784 16 UN 2,834 2,807 20 UN 2,842 2,820 9 © ISO 2009 – All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS Pitch diameter `,,```,,,,````-`-`,,`,,`,`,,` - Table (continued) Not for Resale ISO 725:2009(E) Table (continued) Size Major diameter Number of threads per inch D, d n Thread series in 3 1/8 1/4 3/8 `,,```,,,,````-`-`,,`,,`,`,,` - 1/2 5/8 3/4 3,000 3,125 3,250 3,375 3,500 3,625 3,750 Minor diameter D2, d2 D1, d1 in in UNC 2,837 2,729 UN 2,891 2,819 UN 2,918 2,864 12 UN 2,945 2,909 16 UN 2,959 2,932 20 UN 2,967 2,945 UN 2,962 2,854 UN 3,016 2,944 UN 3,043 2,989 12 UN 3,070 3,034 16 UN 3,084 3,057 UNC 3,087 2,979 UN 3,141 3,069 UN 3,168 3,114 12 UN 3,195 3,159 16 UN 3,209 3,182 UN 3,212 3,104 UN 3,266 3,194 UN 3,293 3,239 12 UN 3,320 3,284 16 UN 3,334 3,307 UNC 3,337 3,229 UN 3,391 3,319 UN 3,418 3,364 12 UN 3,445 3,409 16 UN 3,459 3,432 UN 3,462 3,354 UN 3,516 3,444 UN 3,543 3,489 12 UN 3,570 3,534 16 UN 3,584 3,557 UNC 3,587 3,479 UN 3,641 3,569 UN 3,668 3,614 12 UN 3,695 3,659 16 UN 3,709 3,682 10 Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS Pitch diameter © ISO 2009 – All rights reserved Not for Resale ISO 725:2009(E) Table (continued) Size Major diameter Number of threads per inch D, d n Thread series in 7/8 4 1/8 1/4 3/8 1/2 5/8 3,875 4,000 4,125 4,250 4,375 4,500 4,625 Minor diameter D2, d2 D1, d1 in in UN 3,712 3,604 UN 3,766 3,694 UN 3,793 3,739 12 UN 3,820 3,784 16 UN 3,834 3,807 UNC 3,837 3,729 UN 3,891 3,819 UN 3,918 3,864 12 UN 3,945 3,909 16 UN 3,959 3,932 UN 3,962 3,854 UN 4,016 3,944 UN 4,043 3,989 12 UN 4,070 4,034 16 UN 4,084 4,057 UN 4,087 3,979 UN 4,141 4,069 UN 4,168 4,114 12 UN 4,195 4,159 16 UN 4,209 4,182 UN 4,212 4,104 UN 4,266 4,194 UN 4,293 4,239 12 UN 4,320 4,284 16 UN 4,334 4,307 UN 4,337 4,229 UN 4,391 4,319 UN 4,418 4,364 12 UN 4,445 4,409 16 UN 4,459 4,432 UN 4,462 4,354 UN 4,516 4,444 UN 4,543 4,489 12 UN 4,570 4,534 16 UN 4,584 4,557 `,,```,,,,````-`-`,,`,, 11 © ISO 2009 – All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS Pitch diameter Not for Resale ISO 725:2009(E) Table (continued) Size Major diameter Number of threads per inch D, d n Thread series in 3/4 7/8 `,,```,,,,````-`-`,,`,,`,`,,` - 1/8 1/4 3/8 1/2 4,750 4,875 5,000 5,125 5,250 5,375 5,500 Minor diameter D2, d2 D1, d1 in in UN 4,587 4,479 UN 4,641 4,569 UN 4,668 4,614 12 UN 4,695 4,659 16 UN 4,709 4,682 UN 4,712 4,604 UN 4,766 4,694 UN 4,793 4,739 12 UN 4,820 4,784 16 UN 4,834 4,807 UN 4,837 4,729 UN 4,891 4,819 UN 4,918 4,864 12 UN 4,945 4,909 16 UN 4,959 4,932 UN 4,962 4,854 UN 5,016 4,944 UN 5,043 4,989 12 UN 5,070 5,034 16 UN 5,084 5,057 UN 5,087 4,979 UN 5,141 5,069 UN 5,168 5,114 12 UN 5,195 5,159 16 UN 5,209 5,182 UN 5,212 5,104 UN 5,266 5,194 UN 5,293 5,239 12 UN 5,320 5,284 16 UN 5,334 5,307 UN 5,337 5,229 UN 5,391 5,319 UN 5,418 5,364 12 UN 5,445 5,409 16 UN 5,459 5,432 12 Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS Pitch diameter © ISO 2009 – All rights reserved Not for Resale ISO 725:2009(E) Size Major diameter Number of threads per inch D, d n Thread series in 5/8 3/4 7/8 5,625 5,750 5,875 6,000 Minor diameter D2, d2 D1, d1 in in UN 5,462 5,354 UN 5,516 5,444 UN 5,543 5,489 12 UN 5,570 5,534 16 UN 5,584 5,557 UN 5,587 5,479 UN 5,641 5,569 UN 5,668 5,614 12 UN 5,695 5,659 16 UN 5,709 5,682 UN 5,712 5,604 UN 5,766 5,694 UN 5,793 5,739 12 UN 5,820 5,784 16 UN 5,834 5,807 UN 5,837 5,729 UN 5,891 5,819 UN 5,918 5,864 12 UN 5,945 5,909 16 UN 5,959 5,932 13 © ISO 2009 – All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS Pitch diameter `,,```,,,,````-`-`,,`,,`,`,,` - Table (continued) Not for Resale ISO 725:2009(E) Bibliography [1] ISO 68-2, ISO general-purpose screw threads — Basic profile — Part 2: Inch screw threads [2] ISO 263, ISO inch screw threads — General plan and selection for screws, bolts and nuts — Diameter range 0.06 to in [3] ISO 5408, Screw threads — Vocabulary `,,```,,,,````-`-`,,`,,`,`,,` - 14 Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS © ISO 2009 – All rights reserved Not for Resale `,,```,,,,````-`-`,,`,,`,`,,` - Copyright International Organization for Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS Not for Resale ISO 725:2009(E) ICS 21.040.20 Price based on 14 pages `,,```,,,,````-`-`,,`,,`,`,,` - © ISO 2009 – Allforrights reserved Copyright International Organization Standardization Provided by IHS under license with ISO No reproduction or networking permitted without license from IHS Not for Resale