1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ICS 49.030.10 ISBN 0-626-15258-5 SANS 1700-2-22:2004 Edition 1 ISO 5855-2:1999 Edition 3 SOUTH AFRICAN NATIONAL STANDARD Fasteners Part 2: Screw threads
4、Section 22: Aerospace MJ threads Limit dimensions for bolts and nuts This national standard is the identical implementation of ISO 5855-2:1999 and is adopted with the permission of the International Organization for Standardization. Published by Standards South Africa 1 dr lategan road groenkloof !
5、private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa 2004 SANS 1700-2-22:2004 Edition 1 ISO 5855-2:1999 Edition 3 Table of changes Change No. Date Scope Abstract Specifies limit dimensions for MJ threads for bolts and n
6、uts of nominal diameter 1,6 mm to 39 mm for use in aerospace construction. Keywords aerospace construction, bolts, fasteners, nuts, specifications. National foreword This South African standard was approved by National Committee StanSA TC 5120.01, Screw threads and fasteners, in accordance with proc
7、edures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. AReference numberISO 5855-2:1999(E)INTERNATIONALSTANDARDISO5855-2Third edition1999-10-15Aerospace MJ threads Part 2:Limit dimensions for bolts and nutsAronautique et espace Filetage MJ Partie 2: Dimensions limites
8、 pour vis et crousISO 5855-2:1999(E) ISO 1999All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronicor mechanical, including photocopying and microfilm, without permission in writing from the publisher.Interna
9、tional Organization for StandardizationCase postale 56 CH-1211 Genve 20 SwitzerlandInternet isoiso.chPrinted in SwitzerlandiiForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISOmember bodies). The work of preparing International
10、 Standards is normally carried out through ISO technicalcommittees. Each member body interested in a subject for which a technical committee has been established hasthe right to be represented on that committee. International organizations, governmental and non-governmental, inliaison with ISO, also
11、 take part in the work. ISO collaborates closely with the International ElectrotechnicalCommission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.Draft International Standards adopted b
12、y 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.International Standard ISO 5855-2 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles,Subco
13、mmittee SC 4, Aerospace fastener systems.This third edition cancels and replaces the second edition (ISO 5855-2:1988), of which it constitutes a technicalrevision.ISO 5855 consists of the following parts, under the general title Aerospace MJ threads:Part 1: General requirementsPart 2: Limit dimensio
14、ns for bolts and nutsPart 3: Limit dimensions for fittings for fluid systemsINTERNATIONAL STANDARD ISO ISO 5855-2:1999(E)1Aerospace MJ threads Part 2:Limit dimensions for bolts and nuts1 ScopeThis part of ISO 5855 specifies limit dimensions of MJ threads for bolts and nuts of nominal diameter 1,6 mm
15、 to39 mm for aerospace construction.2 Normative referencesThe following normative documents contain provisions which, through reference in this text, constitute provisions of thispart of ISO 5855. For dated references, subsequent amendments to, or revisions of, any of these publications do notapply.
16、 However, parties to agreements based on this part of ISO 5855 are encouraged to investigate the possibility ofapplying the most recent edition of the normative documents indicated below. For undated references, the latest editionof the normative document referred to applies. Members of ISO and IEC
17、maintain registers of currently validInternational Standards.ISO 965-1:1998, ISO general-purpose metric screw threads Tolerances Part 1: Principles and basic data.ISO 5855-1:1999, Aerospace MJ threads Part 1: General requirements.3 Nominal diameters and pitchesSee Table 1.Table 1 Nominal diameters a
18、nd pitchesDimensions in millimetresNominal diameterd or DPitchPNominal diameterd or DPitchP1,6 0,35 142 0,4 162,5 0,45 18 1,53 0,5 203,5 0,6 224 0,7 245 0,8 27630271 383610 1,25 3912ISO 5855-2:1999(E) ISO24 Tolerance classesSee Table 2.Table 2 Tolerance classesBolt threads Nut threadsd 6h D16H for n
19、ominal diameter 6 mmd24h D24H5 Provisions for coated threadsBefore coating, the dimensions of the threads shall be compatible with the thickness of the coating selected andwith the limit dimensions for finished parts specified in clause 6.6 Limit dimensions for finished parts (coated or uncoated)6.1
20、 Bolt threadsFigure 1 illustrates the position and the form of the limit profiles (maximum and minimum) in relation to the basicprofile (see ISO 5855-1).Tables 3 and 4 specify the limit dimensions.aPitch D PbBasic and maximum profilescBasic profiledMinimum profileFigure 1 Limit profiles for bolt thr
21、eads ISOISO 5855-2:1999(E)3Table 3 Limit dimensions for 4h6h threads for boltsDimensions in millimetresMajor diameterdPitch diameterd2Minor diameterd3Thread designation TdTd2Td3max. min.(6h) a max. min.(4h) a max. min.MJ1,6 0,35-4h6h1,600 1,515 0,085 1,373 1,333 0,04 1,196 1,135 0,061MJ2 0,4-4h6h2,0
22、00 1,905 0,095 1,740 1,698 0,042 1,538 1,472 0,066MJ2,5 0,45-4h6h2,5 2,4 0,1 2,208 2,163 0,045 1,980 1,908 0,072MJ3 0,5-4h6h3,000 2,894 0,106 2,675 2,627 0,048 2,423 2,345 0,078MJ3,5 0,6-4h6h3,500 3,375 0,125 3,110 3,057 0,053 2,807 2,718 0,089MJ4 0,7-4h6h4,00 3,86 0,14 3,545 3,489 0,056 3,192 3,094
23、 0,098MJ5 0,8-4h6h5,00 4,85 0,15 4,48 4,42 0,06 4,076 3,968 0,108MJ6 1-4h6h6,00 5,82 0,18 5,350 5,279 0,071 4,845 4,713 0,132MJ7 1-4h6h7,00 6,82 0,18 6,350 6,279 0,071 5,845 5,713 0,132MJ8 1-4h6h8,00 7,82 0,18 7,350 7,279 0,071 6,845 6,713 0,132MJ10 1,25-4h6h10,000 9,788 0,212 9,188 9,113 0,075 8,55
24、7 8,406 0,151MJ12 1,25-4h6h12,000 11,788 0,212 11,188 11,103 0,085 10,557 10,396 0,161MJ14 1,5-4h6h14,000 13,764 0,236 13,026 12,936 0,09 12,268 12,087 0,181MJ16 1,5-4h6h16,000 15,764 0,236 15,026 14,936 0,09 14,268 14,087 0,181MJ18 1,5-4h6h18,000 17,764 0,236 17,026 16,936 0,09 16,268 16,087 0,181M
25、J20 1,5-4h6h20,000 19,764 0,236 19,026 18,936 0,09 18,268 18,087 0,181MJ22 1,5-4h6h22,000 21,764 0,236 21,026 20,936 0,09 20,268 20,087 0,181MJ24 2-4h6h24,00 23,72 0,28 22,701 22,595 0,106 21,691 21,464 0,227MJ27 2-4h6h27,00 26,72 0,28 25,701 25,595 0,106 24,691 24,464 0,227MJ30 2-4h6h30,00 29,72 0,
26、28 28,701 28,595 0,106 27,691 27,464 0,227MJ33 2-4h6h33,00 32,72 0,28 31,701 31,595 0,106 30,691 30,464 0,227MJ36 2-4h6h36,00 35,72 0,28 34,701 34,595 0,106 33,691 33,464 0,227MJ39 2-4h6h39,00 38,72 0,28 37,701 37,595 0,106 36,691 36,464 0,227aIn accordance with ISO 965-1Table 4 Root radii for bolt
27、threadsDimensions in millimetresPitchPRoot radiusRmax. min.0,35 0,063 0,0530,4 0,072 0,0600,45 0,081 0,0680,5 0,090 0,0750,6 0,108 0,0900,7 0,126 0,1050,8 0,144 0,1201 0,18 0,151,25 0,226 0,1881,5 0,271 0,2252 0,361 0,300ISO 5855-2:1999(E) ISO46.2 Nut threadsFigure 2 illustrates the position and the
28、 form of the limit profiles (maximum and minimum) in relation to the basicprofile (see ISO 5855-1).Table 5 specifies the limit dimensions.aPitch D PbBasic profilecMaximum profiledBasic and minimum profilesFigure 2 Limit profiles for nut threads ISOISO 5855-2:1999(E)5Table 5 Limit dimensions of 4H6H
29、threads for nuts of diameter MJ1,6 to MJ5and limit dimensions of 4H5H threads for nuts of diameter MJ6 to MJ39Dimensions in millimetresThread designation Major Pitch diameter Minor diameterD3aD2D1TD2TD1max. max. min.(4H)b max. min.(6H)b(5H)bMJ1,6 0,35-4H6H1,704 1,426 1,373 0,053 1,359 1,259 0,1MJ2 0
30、,4-4H6H2,114 1,796 1,740 0,056 1,722 1,610 0,112MJ2,5 0,45-4H6H2,625 2,268 2,208 0,06 2,187 2,062 0,125MJ3 0,5-4H6H3,135 2,738 2,675 0,063 2,653 2,513 0,14MJ3,5 0,6-4H6H3,658 3,181 3,110 0,071 3,075 2,915 0,16MJ4 0,7-4H6H4,176 3,620 3,545 0,075 3,498 3,318 0,18MJ5 0,8-4H6H5,195 4,56 4,48 0,08 4,421
31、4,221 0,2MJ6 1-4H5H6,239 5,445 5,350 0,095 5,216 5,026 0,19MJ7 1-4H5H7,239 6,445 6,350 0,095 6,216 6,026 0,19MJ8 1-4H5H8,239 7,445 7,350 0,095 7,216 7,026 0,19MJ10 1,25-4H5H10,28 9,288 9,188 0,1 8,994 8,782 0,212MJ12 1,25-4H5H12,292 11,300 11,188 0,112 10,994 10,782 0,212MJ14 1,5-4H5H14,335 13,144 1
32、3,026 0,118 12,775 12,539 0,236MJ16 1,5-4H5H16,335 15,144 15,026 0,118 14,775 14,539 0,236MJ18 1,5-4H5H18,335 17,144 17,026 0,118 16,775 16,539 0,236MJ20 1,5-4H5H20,335 19,144 19,026 0,118 18,775 18,539 0,236MJ22 1,5-4H5H22,335 21,144 21,026 0,118 20,775 20,539 0,236MJ24 2-4H5H24,429 22,841 22,701 0
33、,14 22,351 22,051 0,3MJ27 2-4H5H27,429 25,841 25,701 0,14 25,351 25,051 0,3MJ30 2-4H5H30,429 28,841 28,701 0,14 28,351 28,051 0,3MJ33 2-4H5H33,429 31,841 31,701 0,14 31,351 31,051 0,3MJ36 2-4H5H36,429 34,841 34,701 0,14 34,351 34,051 0,3MJ39 2-4H5H39,429 37,841 37,701 0,14 37,351 37,051 0,3aD3min. i
34、s not specified. However, it shall be greater than D (see Figure 2).bIn accordance with ISO 965-16.3 Maximum permissible deviations on pitch (lead) and on half flank angleValues given in Table 6 have been taken from Table 6 of ISO 5855-1.ISO 5855-2:1999(E) ISO6Table 6 Maximum permissible deviations
35、on pitch (lead) and on half flank angleNominal diameter Pitch Bolt thread Nut threadd or DPDP Da DP Damm mmmm mm1,6 0,35 9,2 1 45 12,2 2 192 0,4 9,7 1 37 12,9 2 82,5 0,45 10,4 1 32 13,9 2 23 0,5 11,1 1 28 14,5 1 553,5 0,6 12,2 1 21 16,4 1 484 0,7 12,9 1 13 17,3 1 385 0,8 13,9 1 9 18,5 1 326-7-8 1 16,4 1 5 21,9 1 2710 1,25 17,3 0 55 23,1 1 1312 1,25 19,6 1 2 25,9 1 2214 16 1820 22-1,5 20,8 0 55 27,2 1 1224 27 3033 36 39-2 24,5 0 49 32,3 1 4
