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31-2_Edtn_2008.pdf

1、AN AMERICAN NATIO NAL STANDARDASME B18.31.2-2008Continuous and Double-End Studs(Inch Series)Copyright 2008 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.cCopyrighted material licensed to Stanford University by Thomson Sci

2、entific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.ASME B18.31.2-2008Continuous andDouble-End Studs(Inch Series)AN AMERICAN NATIONAL STANDARDCopyright 2008 by the American Society of Mechanical Engineers.No r

3、eproduction may be made of this material without written consent of ASME.cCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance

4、:November 24,2008This 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.Periodically,certain actions of the ASME B18

5、Committee may be published as Cases.Casesand 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 code or standard was developed under procedures

6、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 forpublic

7、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 validity of any

8、 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 determina

9、tion 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 standard.

10、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 system or

11、 otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2008 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyright 2008 by the American Society of Mechanical E

12、ngineers.No reproduction may be made of this material without written consent of ASME.cCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.CON

13、TENTSForeword.ivCommittee Roster.vCorrespondence With the B18 Committee.vi1Introduction.12Comparison With ISO Documents.13Referenced Standards.14Terminology.15Dimensions.16Body Diameter.37Length.38Points.39Thread Length.310 Screw Threads.311 Materials and Mechanical Properties.712 Identification Sym

14、bols.713 Finish.714 Workmanship.715 Straightness.716 Inspection and Quality Assurance.717 Dimensional Conformance.718 Clearance Holes.819 Designation.8Tables1Dimensions for Continuous Thread Studs.22Dimensions for Clamping Type Studs.43Dimensions for Tap End Studs(1.5D Engagement).54Body Diameters f

15、or Double End Studs.65Length Tolerances for Studs.7Mandatory AppendixIStud Straightness,Referee Gage,and Gaging Procedures.9iiiCopyright 2008 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.cCopyrighted material licensed to

16、 Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.FOREWORDASMEStandardsCommitteeB18fortheStandardizationofBolts,Nuts,Rivets,Screws,Washers,and Similar Fasteners(formerly American National Standards Committee B18)was organizedin March 1922 as Sectional Committee B18 under theaegis of the American Engineering StandardsCommittee(later the American Standards Association,the

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