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 Bolts ANSI 818.2.3.6M-1979 REAFFIRMED 1995 Government Key Words:Bolt,Heavy Hex-Metric FOR CURRENT COMMllTEE PERSONNEL PLEASE SEE ASME MANUAL AS1 1 SECRETARIAT SOCIETY OF AUTOMOTIVE ENGINEERS THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS
2、 PUBLISHED BY T H E A M E R I C A N S O C I E T Y O F 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.1001 7 Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further
3、 reproduction or distribution is permitted.Uncontrolled when printed.REAFFIRMED 2001FOR CURRENT COMMITTEE PERSONNELPLEASE E-MAIL CSasme.orgANSI 618.2.3.6M-79 26APRlL 1979 ACCEPTANCE NOTICE This non-Government document was adopted on 26 April 1979 and is approved for use by the DoD and Federal Agenci
4、es.Metric heavy hex bolts shall conform to this document and Appendix 111,which establishes standard items for Government application.Appendix 111,Table 4 shall be used for item selec-tion in accordance with the part numbering system and size information contained therein.The indicated industry grou
5、p has furnished the clearances required by existing regulations.Copies of the document are stocked by DoD Single Stock Point,Naval Publications and Forms Center,Philadelphia,PA,19120,for issue to DoD activities and Federal Agencies only.Contractors and industry groups must obtain copies directly fro
6、m: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,Heavy Hex-Metric ANSI Document No.:ANSI B18.2.3.6M-1979 Date of Specific Issue Adopted:26 A
7、pril 1979 Releasing Industry Group:The American Society of Mechanical Engineers Custodians:Army-AR Navy-AS Air Force-99 Military Coordinating Activity Army-AFT-(Project 5306-0621).,.Review Activities:User Activities:Army-AV,MI,ER Army-ME,AT Navy-MC Navy-SH NSA-NS DLA-IS Civil Agencies:GSA-FSS NOTICE
8、: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 participation.I FSC 5305 I No part of this document may be reproduce
9、d 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 01979 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A.Copyrighted material licensed to Stanford University
10、 by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.E R RATA to ANSI B18.2.4.6M-1979 METRIC HEAVY HEX NUTS Title Page,for Government Key Words,change to read Nuts,Heavy Hex-Metric.Page 6,for MAT
11、ERIAL AND FINISH CODE A and B,change 0.005 mm to read 5.1 pm 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 re
12、production or distribution is permitted.Uncontrolled when printed.FOREWORD American National Standards Committee B18 for the standardization 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
13、Committee (later the American Standards Association,then the United States of American Standards Institute and,as of October 6,1969,the American National Standards Institute,Inc.),with the Society of Automotive Engineers and the American Society of Mechanical Engineers as joint sponsors.Subcommittee
14、 2 was subsequently established and charged with the responsibility for technical content of standards covering wrench head bolts and 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 f
15、or developing standards for metric hex bolts,screws and nuts.At a meeting on September 22,1976,Subcommittee 2 urganized the contents of 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 dimen
16、sions 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 draft American National Standards for metric fasteners in such a way that they could be used directly by the Government for procurement purposes.The Department of Defense
