ISO INTERNATIONAL STANDARD 691 Fourth edition 2005-11-01 Assemblytoolsforscrewsandnuts Wrench and socket openings Tolerances for generaluse Outilsdemanmuvrepourvisetecrous-Ouverturesdecleset d'embouts de serrage - Tolerances d'usage courant Reference number ISO 691:2005(E) @ ISO 2005 ISO 691:2005(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 ISO2005 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, 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+41227490947 E-mail [email protected] Web www.iso.org ii iSO2005-Allrightsreserved ISO691:2005(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeen established has the right to be represented on that committee. International organizations, governmental and International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEc Directives, Part 2. 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 691 was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 10, Assembly tools for screws and nuts, pliers and nippers. This fourth edition cancels and replaces the third edition (ISO 691:1997), Table 1 of which has been technicallyrevised iSO2005-Allrightsreserved ili INTERNATIONALSTANDARD ISO 691:2005(E) Assemblytools for screws and nuts - Wrench and socket openings - Tolerances for general use Scope This International Standard specifies tolerances on wrench and socket openings for screws and nuts (or similar parts) having metric width across flats dimensions,as shown diagrammatically below It gives, for each dimension, the tolerances for general use, defined by its two deviations, minimum and maximum,withrespecttothenominalvalue. These deviations have been determined in relation to the width across flats tolerances for screws and nuts specified in ISO 4759-1 and with regard to the manufacture of tightening tools. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated document (including any amendments) applies. ISO4759-1, Tolerancesforfasteners -Part1:Bolts,screws,studsandnuts -ProductgradesA,B,andC 3Tolerances The tolerances for the openings of wrenches, box wrenches and socket wrenches as shown in Figure 1 are given in Table 1. For wrenches, only the tolerance class 1 shall be used. @IS02005-Allrights reserved ISO 691:2005(E) 1 2 m Key 1 wrench (open) 2 box wrench (closed) 3 socketwrench (closed) Table1-