1、BSI Standards PublicationBS ISO 7738:2015Assembly tools for screws andnuts Combination wrenches Lengths of wrenches andmaximum thickness of headsBS ISO 7738:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 7738:2015. Itsupersedes BS ISO 7738:2001 which is w
2、ithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee MTE/15, Hand tools.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are r
3、esponsible for its correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 80198 3ICS 25.140.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStanda
4、rds Policy and Strategy Committee on 30 April 2015.Amendments issued since publicationDate Text affectedBS ISO 7738:2015 ISO 2015Assembly tools for screws and nuts Combination wrenches Lengths of wrenches and maximum thickness of headsOutils de manoeuvre pour vis et crous Cls mixtes de serrage Longu
5、eurs des cls et paisseurs maximales des ttesINTERNATIONAL STANDARDISO7738Fourth edition2015-05-01Reference numberISO 7738:2015(E)BS ISO 7738:2015ISO 7738:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015All rights reserved. Unless otherwise specified, no part of this public
6、ation may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the countr
7、y of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 7738:2015ISO 7738:2015(E)Foreword iv1 Scope . 12 Normative reference . 13 Dimensions . 14 Technical specifications 1
8、5 Designation 16 Marking 2Bibliography 4 ISO 2015 All rights reserved iiiContents PageBS ISO 7738:2015ISO 7738:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Stand
9、ards 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 ta
10、ke part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In pa
11、rticular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of
12、 this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see
13、www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to
14、the WTO principles in the Technical Barriers to Trade (TBT), see the following URL: Foreword Supplementary information .The committee responsible for this document is ISO/TC 29, Small tools, Subcommittee SC 10, Assembly tools for screws and nuts, pliers and nippers.This fourth edition cancels and re
15、places the third edition (ISO 7738:2001), which has been technically revised with the following changes: a) This International Standard has been editorially updated, including editorial changes in the scope;b) the normative references have been updated;c) a new Clause 4 about technical specification
16、s has been included;d) additional opening sizes have been included in Table 1;e) a bibliography has been added.iv ISO 2015 All rights reservedBS ISO 7738:2015Assembly tools for screws and nuts Combination wrenches Lengths of wrenches and maximum thickness of heads1 ScopeThis International Standard s
17、pecifies the overall length and the maximum head thickness of combination wrenches, offset (Form A) and offset (Form B).NOTE Combination wrenches are listed in ISO 1703, under designation 1 1 01 05 0 (Form A) and designation 1 1 01 06 0 (Form B).2 Normative referenceThe following documents, in whole
18、 or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 691:2005, Assembly tools for screws a
19、nd nuts Wrench and socket openings Tolerances for general useISO 1711-1, Assembly tools for screws and nuts Technical specifications Part 1: Hand-operated wrenches and sockets3 DimensionsDimensions shall be according to Figure 1 and Table 1.The tolerances of the wrench opening, s, shall conform to t
20、hose shown in ISO 691:2005, Table 1, “Tolerance class 1” series.Figure 1 of this International Standard is only an example and should not influence the design of the wrench.4 Technical specificationsThe technical specifications shall be in accordance with ISO 1711-1.5 DesignationA combination wrench
21、 in accordance with this International Standard shall be designated by the following:a) “Wrench”b) reference to this International Standard, i.e. ISO 7738;c) series, i.e. short, medium, or long;d) Form, i.e. A or B;e) wrench opening.EXAMPLE A modified offset (Form B) combination wrench, medium serie
22、s, with the wrench opening of 12 mm is designated as follows:Wrench ISO 7738 - Medium B 12INTERNATIONAL STANDARD ISO 7738:2015(E) ISO 2015 All rights reserved 1BS ISO 7738:2015ISO 7738:2015(E)6 MarkingCombination wrenches, offset and modified offset, shall be marked, permanently and legibly, with th
23、e following:a) wrench opening;b) name or trademark of the manufacturer (or the responsible supplier).a) Form A offsetb) Form B modified offsetFigure 1 Combination wrenchesTable 1 Lengths of wrenches and thickness of the headsNominal width across flat sSeries “short” Series “medium” Series “long”Thic
24、kness of the headslmaxlmax(non- preferred)lminlmaxlmin(non- preferred)lmine1, maxe2, maxmm mm mm mm mm mm mm mm3,2 54 80 55 110 3,3 53,5 a54 80 55 110 3,5 5,54 54 80 55 110 3,5 5,54,5 a64 85 65 115 4 65 64 85 65 115 4 65,5 69 85 70 120 4,2 6,36a74 90 75 120 4,5 6,5aNot according to ISO 272.2 ISO 201
25、5 All rights reservedBS ISO 7738:2015ISO 7738:2015(E)Nominal width across flat sSeries “short” Series “medium” Series “long”Thickness of the headslmaxlmax(non- preferred)lminlmaxlmin(non- preferred)lmine1, maxe2, maxmm mm mm mm mm mm mm mm7 79 95 80 130 5 78 89 100 90 145 120 146 5 89 a99 105 100 15
26、0 125 151 5,5 8,510 109 115 110 155 135 156 6 911 114 120 115 160 140 161 6,5 9,512 a124 135 125 175 155 176 7 1013 134 145 135 190 165 191 7 1114 a144 150 145 200 175 201 7,5 11,515 a149 155 150 210 185 211 8 1216 159 170 160 225 205 226 8 12,517 a169 180 170 240 215 241 8,5 1318 179 190 180 250 23
27、0 251 9 1419 a184 200 185 260 230 261 9 14,520 a 200 265 266 10 1521 205 270 250 271 10 15,522 a 215 280 260 281 10,5 1623 a 220 290 291 11 1724 230 300 270 301 11 17,525 a 240 310 311 12 1827 255 330 300 331 12,5 1930 285 370 330 371 13,5 2032 a 300 390 350 391 14,5 2134 320 415 385 416 15 22,536 3
28、35 435 405 436 15,5 23,541 380 495 455 496 17,5 26,546 425 555 515 556 19,5 29,550 460 600 560 601 21 3255 560 650 651 22 3360 595 710 701 24 35aNot according to ISO 272.Table 1 (continued) ISO 2015 All rights reserved 3BS ISO 7738:2015ISO 7738:2015(E)Bibliography1 ISO 1703, Assembly tools for screw
29、s and nuts Designation and nomenclature4 ISO 2015 All rights reservedBS ISO 7738:2015BS ISO 7738:2015ISO 7738:2015(E) ISO 2015 All rights reservedICS 25.140.30Price based on 4 pagesThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standar
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