1、A M E R I C A N N A T I O N A L S T A N D A R D Metric Heavy Hex Structural Bolts ANSI B18.2.3.7M-1979 p m n m.-.a A-I.Government Key Words:Bolt,Structural,Heavy Hex-REAFFIRMED 1995 Metric FOR CURRENT COMMllTEE PERSONNEL PLEASE SEE ASME MANUAL AS-1 1 SECRETARIAT SOCIETY OF AUTOMOTIVE ENGINEERS THE A
2、MERICAN SOCIETY OF MECHANICAL ENGINEERS P U B L I S H E D B Y T H E A M E R I C A N S O C I E T Y OF M E C H A N I C A L E N G I N E E R S United Engineering Center 345 East 47th Street New York,N.Y.10017 Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-
3、05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.REAFFIRMED 2001FOR CURRENT COMMITTEE PERSONNELPLEASE E-MAIL CSasme.orgANSI 818.2.3.7M-79 26APRlL 1979 ACCEPTANCE NOTICE This non-Government document was adopted on 26 April 1979 and is
4、approved for use by the DoD and Federal Agencies.Metric heavy hex structural bolts shall conform to this document and Appendix 111,which establishes standard items for Government application.Appendix 111,Table 5 shall be used for item selection in accordance with the part numbering system and size i
5、nformation contained therein.The indicated industry group has furnished the clearances required by existing regulations.Copies of the docu-ment are stocked by DoD Single Stock Point,Naval Publications and Forms Center,Philadelphia,PA,19120,for issue to DoD activities and Federal Agencies only.Contra
6、ctors and industry groups must obtain copies directly from:The American Society of Mechanical Engineers United Engineering Center,345 E.47th Street New York,NY 10017 or The American National Standards Institute 1430 Broadway,New York,NY 10018 Title of Document:Bolt,Structural,Heavy Hex-Metric ANSI D
7、ocument No.:ANSI B18.2.3.7M-1979 Date of Specific Issue Adopted:26 April 1979 Releasing Industry Group:The American Society of Mechanical Engineers Custodians:Army-AR Navy-AS Air Force-99 Military Coordinating Activity Army-AR(Project 5306-0622)Review Activities:User Activities:Army-AV,MI,ER Army-ME
8、,AT Navy-MC Navy-SH DLA-IS NSA-NS Civil Agencies:GSA-FSS NOTICE:When reaffirmation,amendment,revision,or cancellation of this standard is initially proposed,the industry group responsible for this standard shall inform the Military Coordinating Activity of the proposed action and request their parti
9、cipation.m 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.Date of Issuance:August 31,1979 Copyright 1979 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A.C
10、opyrighted 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.ERRATA to ANSIB18.2.3.7M-1979 METRIC HEAVY HEX STRUCTURAL BOLTS Page 3,Note 16,change B.13
11、to read B 1.13 M THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS 345 East 47 Street,New York,N.Y.1001 7 April 1981 Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Unco
12、ntrolled when printed.Copyrighted 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.FOREWORD American National Standards Committee B18 for the standardi
13、zation of bolts,screws,nuts,rivets and similar fasteners was organized in March 1922,as Sectional Committee B18 under the aegis of the American Engineering Standards Committee (later the American Standards Association,then the United States of American Standards Institute and,as of October 6,1969,th
14、e American National Standards Institute,Inc.),with the Society of Automotive Engineers and the American Society of Mechanical Engineers as joint sponsors.Subcommittee 2 was subsequently established and charged with the responsibility for technical content of standards covering wrench head bolts and
15、nuts.At its meeting on December 4,1974,Committee B18 authorized preparation of a series of standards for metric fasteners.Subcommittee 2 was assigned responsibility for developing standards for metric hex bolts,screws and nuts.At a meeting on September 22,1976,Subcommittee 2 organized the contents o
16、f a standard covering eight different hex head screw and bolt products.Actual drafting was postponed until ISO/TC2 could reach final decisions relating to basic dimensions and characteristics of hex bolts,screws and nuts.At ISO/TC2 meetings held in April 1977,final actions were taken.Committee B18 affirmed the TC2 decisions at a meeting on June 29,1977 and drafting of this standard was started.In February 1978,Committee B18 established a cooperative program with the Department of Defense to draf