1、STD.ASME B107.21-EN6L199B0759b700605bB1611ASME B107214998WRENCH,CROWFOOTATTACHMENTS(INCH SERIESAN AMERICAN NATIONAL STANDARDSThe American Society ofMechanical EngineersCopyright by the American Society Of Mechanical EngineersSTD.ASME B107.21-EN6L1998075967006056B3494Date of Issuance:Noverber 9,1998T
2、his Standard will be revised when the Society approves the issuance ofa new edition.There will be no addenda or written interpretations of therequirements of this Standard issued to this edition.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard wa
3、s developed under procedures accredited as meeting the criteria forAmerican Nationai Standards.The Standards Committee that approved the code or standardwas balanced to assure that individuals from competent and concerned interests have had anopportunity to participate.I he proposed code or standard
4、 was made available for public reviewand comment that provides an opportunity for additionai public input from industry,academia,regulatory agencies,and the public-at-large.ASME does not approve,rate,or endorseany item,construction,proprietary deviceor activity.ASME does not take any position with r
5、espect to the validity of any patent rights asserted inconnection with any items mentioned in this document,and does not undertake to insure anyoneutilizing a standard against liability for infringement of any applicable Letters Patent,nor assumesany such liability.Users of a code or standard are ex
6、pressly advised that determination of thevalidity of any such patent rights,and the risk of infringement of such rights,is entirely theirown responsibility.Participation by federai agency representative(s)or person(s)affiliated with industry is not tobe interpreted as government or industry cndorsem
7、ent of this code or standard.ASME accepts responsibility for only those interpretations issued in accordance with governingASME procedures and policies which preciude the issuance of interpretations by individualvolunteers.No part of this document may be reproduced in any form,in an electronic retri
8、eval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue,New Yurk,NY 10016-5990Copyright1998byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll Rights ReservedPrinted in U.S.A.STD.ASME B107.2h-EN6L199807596700605684320
9、FOREWORD(This Foreword is not part of ASME B10/.21-1998.)The American National Standards Committee B107.Socket Wrenches and Drives,undersponsorship by The American Society of Mechanical Engineers.heid its organizationalmceting on June 28.1967.Subsequently,the Commiuee was reorganized as an ASMEStand
10、ards Committee,and its title was changed to Hand Tools and Accessories.Members of the Hand Tools Institute Wrench Engineers Committee have been majorcontributors to the devclopment of this Standard in their committee work,their knowledgeof the products.and their active efforts in the promotion of th
11、e adoption of the Standard.This Standard covers the dimensional and functional characteristics of wrench crowfootattachments.Suggestions for improvement of this Standard will be welcome.They should be sent toThe American Society of Mechanical Engineers,Attn:Secretary,ASME B107 Main Commit-tee.Three Park Avenue.New York,NY 10016-5990.This Standard was approved as an American National Standard on September 14,1998.
