1、AN AMERICAN NATIO NAL STANDAR DWrench,Crowfoot ASME B107.21-2005(Revision of ASME B107.21-1998)Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B107.21-2005(Revision of ASME B107.21-1998)Wrench
2、,CrowfootAN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY 10016Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Date of Issuance:July 29,2005This Standard will be revised when the Society
3、approves the issuance of a new edition.There willbe no addenda issued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.Interpretations are published on the ASME website under the Committee Pages athttp:/www.asme.org/codes/as the
4、y are issued.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American NationalStandards.The Standards Committee that approved the code or standard was balanced to assure that
5、individuals fromcompetent and concerned interests have had an opportunity to participate.The proposed code or standard was madeavailable forpublic review andcomment thatprovides an opportunityfor additional publicinput from industry,academia,regulatory agencies,and the public-at-large.ASME does not“
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9、recludes the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue,New York,NY 10016-5990Copy
10、right 2005 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-CONTENTSForeword.ivStandards Committee Roster.vCorrespon
11、dence With the B107 Committee.vi1Scope.12Classification.13Normative References.14Requirements.15Test Procedures.26Designations.37Safety Requirements and Limitations of Use.3Figures1Type I,Class 1 Crowfoot Wrench,Flare Nut,Standard Duty.42Type I,Class 2 Crowfoot Wrench,Flare Nut,Heavy Duty.43Type II
12、Crowfoot Wrench,Open End.7Tables1Type I,Class 1,Flare Nut14in.Square Drive Standard Duty.52Type I,Class 1,Flare Nut38in.Square Drive Standard Duty.53Type I,Class 1,Flare Nut12in.Square Drive Standard Duty.64Type I,Class 2,Flare Nut38in.Square Drive Heavy Duty.64MType I,Class 2,Flare Nut38in.Square D
13、rive Heavy Duty(Metric).75Type II,Class 1,Open End38in.Square Drive Standard Duty.85MType II,Class 1,Open End38in.Square Drive Standard Duty(Metric).96Type II,Class 1,Open End12in.Square Drive Standard Duty.97Type II,Class 2,Open End38in.Square Drive Heavy Duty.108Hexagon Mandrel Dimensions.118MHexa
14、gon Mandrel Dimensions(Metric).11iiiCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-FOREWORDThe American National Standards Committee B107,Socket Wrenches and Drives,under spon-sorshipof TheAmerica
15、nSociety ofMechanical Engineers,wasreorganized asanASME StandardsCommittee and its title was changed to Hand Tools and Accessories.In 1996 its scope wasexpanded to address safety considerations.The purposes of this Standard are to define performance and safety requirements specificallyapplicable to
16、crowfoot wrenches and to specify test methods to evaluate performances relatingto the defined requirements.Members of the Hand Tools Institute Wrench Standards Committee have been major contribu-torstothedevelopmentofthisStandardintheir committeework,theirknowledgeoftheproducts,and their active efforts in the promotion of the adoption of the Standard.This Standard is a revision of ASME B107.21-1998 Wrench,Crowfoot Attachments(Inch Series).Principal changes in this edition of the Standard are the
