1、AN AMERICAN NATIO NAL STANDARDASME B18.2.9-2010(Revision of ASME B18.2.9-2007)Straightness Gage and Gaging for Bolts and ScrewsREAFFIRMED 2017INTENTIONALLY LEFT BLANKASME B18.2.9-2010(Revision of ASME B18.2.9-2007)StraightnessGage andGaging for Boltsand ScrewsAN AMERICAN NATIONAL STANDARDThree Park
2、Avenue New York,NY 10016 USADate of Issuance:September 6,2010This Standard will be revised when the Society 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.P
3、eriodically certain actions of the ASME B18 Committee may be published as Cases.Cases and interpretations are published on the ASME Web site under the Committee Pages athttp:/cstools.asme.org as they are issued.ASME is the registered trademark of The American Society of Mechanical Engineers.This cod
4、e 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 individuals fromcompetent and concerned interests have had an opportunity to participate.The proposed
5、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“approve,”“rate,”or“endorse”any item,construction,proprietary device,or activity.ASME does not take any
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7、r standard are expresslyadvised that determination of the validity of any such patent rights,and the risk of infringement of such rights,isentirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted asgovernment or
8、industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establishedASME procedures and policies,which precludes the issuance of interpretations by individuals.No part of this document may be reproduced in
9、 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 10016-5990Copyright 2010 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTS
10、Foreword.ivCommittee Roster.vCorrespondence With the B18 Committee.vi1Scope.12Comparison With ISO 4759-1:2000.13Referenced Standards.14Terminology.15Dimensions.16Gage.17Procedure.18Straightness Limits.1Table1Screw and Bolt Straightness Limits.2Figures1Typical Straightness Gage.22Gaging.2iiiFOREWORDI
11、n May 2001,the ASME B18 Standards Committee,Standardization of Bolts,Nuts,Rivets,Screws,Washers,and Similar Fasteners,authorized B18 Subcommittee 2,Externally DrivenFasteners,to proceed with the development of a standard covering straightness gage and gagingfor bolts and screws.As a result,ASME B18.
12、2.9 was approved as an American National Standardon March 7,2007.In late 2008,B18 Subcommittee 2 undertook the addition of a set of default straightness limitsto apply to externally threaded inch and metric fasteners for which straightness limits are notstated in the applicable product standard.This
13、 revision was approved as an American National Standard on July 26,2010.ivASME B18 COMMITTEEStandardization of Bolts,Nuts,Rivets,Screws,Washers,and Similar Fasteners(The following is the roster of the Committee at the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSJ.Greenslade,ChairD
14、.S.George,Vice ChairR.D.Strong,Vice ChairC.J.Gomez,SecretarySTANDARDS COMMITTEE PERSONNELV.Cartina,Autocraft IndustrialD.A.Clever,ConsultantA.P.Cockman,Ford Motor Co.C.D.de la Garza,TSPD.S.George,ND IndustriesC.J.Gomez,The American Society of Mechanical EngineersJ.Greenslade,Industrial Fasteners Ins
15、tituteJ.J.Grey,Contributing Member,Fastener Consulting Services,Inc.B.Hasiuk,Contributing Member,Defense Supply CenterPhiladelphiaA.Herskovitz,ConsultantJ.Hubbard,Leland-Powell Fasteners,Inc.J.Jennings,Contributing Member,Naval Surface Warfare CenterW.H.King,Porteous Fastener Co.J.F.Koehl,Contributi
16、ng Member,Spirol International Corp.SUBCOMMITTEE 2 EXTERNALLY DRIVEN FASTENERSJ.Greenslade,Chair,Industrial Fasteners InstituteC.B.Williamson,Vice Chair,Fastenal Co.V.Cartina,Autocraft IndustrialL.Claus,ATF,Inc.D.A.Clever,ConsultantA.P.Cockman,Ford Motor Co.C.D.de la Garza,TSPB.A.Dusina,Federal Screw WorksM.A.Elmi,ConsultantJ.S.Foote,Trade Association Management,Inc.D.S.George,ND IndustriesA.Herskovitz,ConsultantM.W.Holubecki,Electric Boat Corp.J.Hubbard,Leland-Powell Fasteners,Inc.J.Jennings,Co
