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
3、nterpsDatabase.Periodically certain actions of the ASME B18 Committee may bepublished as Cases.Cases are published on the ASME Web site under the B18 Committee Page atgo.asme.org/B18committee as they are issued.Errata to codes and standards may be posted on the ASME Web site under the Committee Page
4、s toprovide corrections to incorrectly published items,or to correct typographical or grammatical errorsin codes and standards.Such errata shall be used on the date posted.The B18 Committee Page can be found at go.asme.org/B18committee.There is an option availableto automatically receive an e-mail n
5、otification when errata are posted to a particular code or standard.ThisoptioncanbefoundontheappropriateCommitteePageafterselecting“Errata”inthe“PublicationInformation”section.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under p
6、rocedures 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 code or standard was madeavailable
7、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 position with respect to the valid
8、ity of any patent rights asserted in connection with anyitems mentioned in this document,and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent,nor assume any such liability.Users of a code or standard are expresslyadvised that
9、 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 industry endorsement of this code or
10、 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 any form,in an electronic retrieval
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