1、AN AM E R IC AN NAT IO NAL STANDARD ASME B18.13-2017Revision of ASME B18.13-1996(R2013)Screw and Washer Assemblies SEMS(Inch Series)REAFFIRMED 2022ASME B18.13-2017Revision of ASME B18.13-1996(R2013)Screw and WasherAssemblies SEMS(Inch Series)AN AMERICAN NATIONAL STANDARDTwo Park Avenue New York,NY 1
2、0016 USADate of Issuance:January 23,2017This Standard will be revised when the Society approves the issuance of a new edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.InterpretationsarepublishedontheCommitteeWebpageandundergo.asme.org/I
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11、 system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersTwo Park Avenue,New York,NY 10016-5990Copyright 2017 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.ivCommittee Roster.viCorrespo
12、ndence With the B18 Committee.vii1Introduction.12General Data.113Data for Helical Spring Lock Washer SEMS.124Data for Tooth Lock Washer SEMS.135Data for Conical Spring Washer SEMS.136Data for Plain Washer SEMS.14Figures1Unthreaded Length on Screws With Machine Screw Thread DiameterPitchCombinations.
13、112Unthreaded Length on Tapping Screws With Spaced Thread DiameterPitchCombinations.113Verification of Bearing Width on Helical Spring Lock Washers.134Enlarged Conical Spring Washer Section and Tooth Washer Dimensions.145Conical Spring Washer Twist Test.15Tables1Dimensions of Helical Spring Lock Was
14、hers for Socket Head Cap Screw SEMS.22Dimensions of Helical Spring Lock Washers for SEMS With Machine andTapping Screws Having Machine Screw Thread DiameterPitchCombinations.33Dimensions of Helical Spring Lock Washers for SEMS With Screws HavingType B Tapping Screw Thread DiameterPitch Combinations.
15、44Dimensions of Internal Tooth Lock Washers for SEMS.55Dimensions of External Tooth Lock Washers for SEMS.66Dimensions of Conical Spring Washers for SEMS.77Dimensions of Plain Washers for SEMS.9Nonmandatory AppendixARelative Proportions of Screw Heads and Plain or Conical Spring Washers.17iiiFOREWOR
16、DAmerican National Standards Committee B27 for the standardization of plain and lock washerswas organized in March 1926 as Sectional Committee B27 under the aegis of the AmericanStandards Association(later the United States of America Standards Institute and,as of October 6,1969,the American National Standards Institute,Inc.)with the Society of Automotive Engineersand the American Society of Mechanical Engineers as joint sponsors.(Since 1950,this Committeehas also been assigned responsibility fo
