1、ACCEPTANCE NOTICE This non-Government document was adopted on 26 April 1979 and is approved for use by the DoD and Federal Agencies. Metric hex bolts shall conform to this document and Appendix III, which establishes standard items for Government application. Appendix 111, Table 4 shall be used for
2、item selection in accordance with the part numbering system and size information contained therein. The indicated industry group has furnished the clearances required by existing regulations. Copies of the document are stocked by DoD Single Stock Point, Naval Publications and Forms Center, Philadelp
3、hia, PA, 19120, for issue to DoD activities and Federal Agencies only. Contractors 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 Bro
4、adway, New York, NY 10018 Title of Document: Bolt, Hex - Metric ANSI Document No.: ANSI B38.2.3.5M-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 Review Activities: Army - AV, MI
5、, ER Navy - MC DLA - IS NSA - NS Military Coordinating Activity Army - AR (Project 5306-0620) User Activities: Amy - ME, AT Navy - SH Civil Agencies: GSA-FSS NOTICE: When reaffirmation, amendment, revision, or cancellation of this standard is initially proposed, the industry group responsible for th
6、is standard shall inform the Military Coordinating Activity of the proposed action and request their participation. Ezq 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: Aug
7、ust 31, 1979 Copyright 01979 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A. ERRATA to ANSI B18.2.3.5M-1979 METRIC HEX BOLTS Page 3, Note 18, chunge B1.13 to rem$ B1.13M Page 5, in the standard shall be replaced with the second page of this errata Page 10, MATER
8、IAL AND FINISH CODE, chunge to read: A - Steel w/Cadmium Plating per QQP-416, Type II, Class 3 (5.1pm Plating.Thickness), Property Class 109. B - Steel w/Zinc Plating per QQ-2-325, Type II, Class 3 (5.1pm Plating Thickness), Property Class 10.9. THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS 345 East
9、47 Street, New York, N.Y. 1 O01 7 May 1981 AMERICAN NATIONAL STANDARD Metric Hex Bolts ANSI B18.2.3.5Wl - 1979 Government Key Words: Mt, Hex-Metric SECRETA RIA T SOCiETY OF AUTOMOTIVE ENGINEERS THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS PUBLISHED BY THE AM,ERICAN SOCIETY OF MECHANICAL ENGINEERS Un
10、ited Engineering Center 345 East 47th Street New York, N. Y. 1 O01 7 f-7: -. PRf36LEM HARD COPY ANSI B18.2.3.5M-79 26 APRIL 1979 ACCEPTANCE NOTICE This non-Government document was adopted on 26 April 1979 and is approved for use by the DoD and Federal Agencies. Metric hex bolts shall conform to this
11、 document and Appendix III, which establishes standard items for Government application. Appendix III, Table 4 shall be used for item selection in accordance with the part numbering system and size information contained therein. The indicated industry group has furnished the clearances required by e
12、xisting 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 from: The American Society of Mechanical
13、 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, Hex - Metric ANSI Document No.: ANSI B18.2.3.5M-1979 Date of Specific Issue Adopted: Releasing Industry Group: Custodian
14、s: Army - AR Navy - AS Air Force - 99 Review Activities: Army - AV, MI, ER Navy - MC DLA - IS NSA - NS Civil Agencies: GSA-FSS 26 April 1979 Th American Society of Mechanical Engineers Military Coordinating Activity Army - AR (Project 5306-0620) User Activities: Army - ME, AT Navy - SH NOTICE: When
15、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. No part of this document may be reproduced in any form,
16、 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. FOREWORD American National Standards Committee B18 for the st
17、andardization 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 Octo
18、ber 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 2 was subsequently established and charged with the responsibility for technical content of standards covering wren
19、ch 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 for developing standards for metric hex bolts, screws and nuts. At a meeting on September 22, 1976, Subcommittee
20、2 organized 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 dimensions and characteristics of hex bolts, screws and nuts. Af ISO/TC2 meetings held in April 1977, final acti
21、ons 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 Fdsteners in such a way t
22、hat they could be used directly by the Government for procurement purposes. The Department of Defense requested that each of the eight products be covered in separate standards, and Subcommittee 2 accepted this approach at its meeting on June 27,1978. This standard was approved by letter ballot of C
23、ommittee B18 on September 15, 1978, and was sub- sequently .approved by the secretariat and submitted to the American National Standards Institute for designation as an American National Standard. This was granted on April 26, 1979. iii ASME B3892-3-5M 79 H 0759670 0043307 9 m AMERICAN NATIONAL STAN
24、DARDS COMMITTEE B18 STANDARDIZATION OF BOLTS, NUTS, RIVETS, SCREWS, WASHERS AND SIMILAR FASTENERS OFFICERS R. P. Trowbridge, Chairman J. B. Levy, Vice-chairman H. G. Muenchinger, Vice-chairman Richard McGinnis, Secretaw COMMITTEE PERSONNEL AMERICAN CHAIN ASSOCIATION L. E. Hampel, Moline Malleable Ir
25、on Company, St. Charles, Illinois AMKRICAN HARDWARE MANU1:ACTURERS ASSOCIATION Donald Wanek, Wrought Washer Manufacturing Company, Milwaukee, Wisconsin AMKRICAN INSTITUTE 01: INDUSTRIAL ENCINEERS R. T. Kelly, Hitchcock Publishing Company, Wheaton, Illinois AMERICAN SOCIETY 01” AGRICULTURAL blNGINEER
26、S E, R. friesth, Deere MECHANICAL ENGINEERS, THE A. R. Machel/, Jr., Xerox corporation, Rochester, New York f. P. Tisch, Desert Hot Springs. California R. P. Trowbridge, GM Technicd Center, Warren, Michigan C. R. Adams, Alternate, Newport News Shipbuilding RICTION BEARING MANUIACTUKERS ASSOCIATION W
27、. J. Derner, I:MC Corporation, Indianapolis, Indiana ENGINE MANU1”ACTURERS ASSOCIATION K. f. Naylor, Cummins Engine Company, Columbus, Indiana .ARM asteners Institute, Cleveland, Ohio A. R. Breed, The Lamson alls, Illinois Graves, Fairfield, Connecticut Harris, Bethlehem Steel Corporation, Lebanon,
28、Pennsylvania Levy, General Electric Company, Schenectady, New York Lipari, Bell Telephone Laboratories, Inc., Columbus, Ohio Machel/, Jr., Xerox Corporation, Rochester, New York McCullough, SPS Technologies, Jenkintown, Pennsylvania McMurray, Russell, Burdsall and within 0.008 mm/mm of bolt length f
29、or bolts having nominal lengths over 300 mm to 600 mm. The referee gage and gaging procedure for check- ing bolt straightness is given in Appendix I. 17. Thread Length 17.1 The length of thread on bolts shall be con- trolled by the grip gaging length Lg max as set forth in 17.2 thru 17.4. 17.2 Grip
30、Gaging Length, Lg max, is the distance measured parallel to the axis of bolt, from the under- side of the head to the face of a non-counterbored or non-countersunk standard GO thread ring gage assembled by hand as far as the thread will permit. 2 ” - ASME BLBm2*3*5M 77 m 0757b70 0043113 4 m AMERICAN
31、 NATIONAL STANDARD METRIC HEX BOLTS The maximum grip gaging length, as calculated and rounded to one decimal place, for any bolt length shall be equal to the nominal bolt length, L, minus the basic thread length, B, as specified in Table 1, (Lg max = L - B). It represents the minimum design grip len
32、gth of the bolt and shall be used as the crite- rion for inspection and for determining thread avail- ability when selecting bolt lengths even though usable threads may extend beyond this point. All bolts of nominal lengths equal to or shorter than the sum of the basic thread length, B, plus a lengt
33、h of 2% thread pitches for sizes up to and in- cluding M24, and B plus 3% thread pitches for sizes larger than M24 shall be threaded full length. For bolts which are threaded full length, the distance from the bearing surface of the head to the face of a non-counterbored or non-countersunk standard
34、GO thread ring gage assembled by hand as far as the thread will permit, shall not exceed the equivalent of 2% thread pitches for sizes up to and including M24, and 3% thread pitches for sizes larger than M24. 17.3 Basic Thread Length, B, as specified in Table 1, is a reference dimension, intended fo
35、r calculation purposes only, and is the distance, measured parallel to the axis of the bolt, from the extreme end of the bolt to the last complete (full form) thread. 17.4 Incomplete Thread Diameter, The major diam- eter of incomplete thread shall not exceed the actual major diameter of the full for
36、m thread. 18. Thread Series. Threads shall be metric coarse thread series conforming to dimensions for general purpose external threads given in ANSI B1.13, unless otherwise specified by the purchaser. The class 6g tolerance shall apply to plain finish (unplated or un- coated) bolts, and to plated o
37、r coated bolts before plating or coating. For bolts with additive finish, the 6g diameters may be exceeded by the amount of the allowance, i.e., the basic diameters shall apply to bolts after plating or coating. 19. Material and Mechanical Properties. Unless other- wise specified, steel bolts shall
38、conform to the re- quirements specified in SAE J1 199 or ASTM F568. Bolts of other materials such as stainless steel, brass, bronze and aluminum alloys shall have properties as agreed upon by the manufacturer and the purchaser. ANSI B18.2.3.5M-1979 20. Finish. Unless otherwise specified, screws and
39、bolts shall be supplied with a natural (as processed) finish, unplated or uncoated. 21. Identification Symbols. Steel bolts shall be marked with the property class symbol and with the manufacturers identification symbol. Minimum height of property class symbols shall be 1.5 mm for M5 and M6 bolts, 2
40、.3 mm for M8 and M10 bolts, 3.2 mm for M12 and M14 bolts, and 4.0 mm for M16 and larger bolts. Markings shall be located on the top of the head and may be raised or recessed unless other- wise ordered by the purchaser. When raised, markings shall project not less than 0.lmm for M14 and smaller bolts
41、, and 0.3 mm for M16 and larger bolts above the surface of the head, and total head height (head plus markings) shall not exceed the specified maximum head height plus 0.1 mm for M5 and M6 bolts, 0.2 mm for M8 and M10 bolts, 0.3 mm for M12 and M14 bolts, and 0.4 mm for M16 and larger bolts. 22. Opti
42、ons. Options, where specified, shall be at the discretion of the manufacturer unless otherwise agreed upon by the manufacturer and the purchaser. 23. Terminology. For definitions of terms relating to fasteners or component features thereof used in this standard, refer to American National Standard,
43、Glossary of Terms for Mechanical Fasteners, ANSI B18.12. 24. Workmanship. Bolts shall not contain an excess of surface imperfections which might affect their serviceability, such as burrs, seams, laps, loose scale and other irregularities. 25. Clearance Holes. The recommended sizes of clearance hole
44、s in material to be assembled using hex bolts are the normal series given in Appendix II. 26. Designation 26.1 Hex bolts shall be designated by the following data, preferably in the sequence shown: product name, nominal diameter and thread pitch, nominal length, steel property class or material iden
45、tification, and protective coating, if required. NOTE It is common practice in IS0 standards to omit thread pitch from the product size designation when screw threads are the metric coarse thread series, e.g., M10 is M10 x 1.5. 3 ASME BL8-2-3*5M 77 AMERICAN NATIONAL STANDARD METRIC HEX BOLTS Example
46、s: Hex bolt, M20 x 2.5 x 160, class 4.6, zinc plated Hex bolt, M36 x 4 x 80, silicon bronze 26.2 The government part numbering system for metric hex bolts is given in Appendix III. 27. Referenced Standards Copies of referenced ASTM standards may be ob- tained from the American Society for Testing an
47、d =F. ANSI B18.2.3.5M-1979 Materials, 1916 Race Street, Philadelphia, Penn- sylvania 19 1 03. Copies of referenced SAE standards may be ob- tained from the Society of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, Penn- sylvania 15096. Copies of referenced IS0 standards may be ob- t
48、ained from the American National Standards Insti- tute, 1430 Broadway, New York, N.Y. 1001 8. t AMERICAN NATIONAL STANDARD METRIC HEX BOLTS ANSI B18.2.3.5M-1979 SEE NOTE 7 7.3 SEE NOTE 14 TO APPEAR ON TOP OF HEAD SEE NOTE 21 Table 1 Dimensions of Hex Bolts f Ds S K D Nominal Bolt Dia and Thread Pitc
49、h . M5 x 0.8 M6x1 M8 x 1.25 M10 x 1.5 M12 x 1.75 M14 x 2 M16 x 2 M20 x 2.5 M24 x 3 M30 x 3.5 M36 x 4 M42 x 4.5 M48 x 5 M56 x 5.5 M64 x 6 M72 x 6 M80 x 6 M90 x6 . Ml00 x 6 See Notes E Width AWO!iS Comers K1 Da lrench- Fillet Y tion Tami- ielght Dia Min Max 2.4 5.7 2.8 6.8 3.7 9.2 4.5 11.2 5.2 13.7 6.2 15.7 7.0 17.7 8.8 22.4 10.5 26.4 13.1 33.4 15.8 39.4 18.2 45.4 21.0 52.0 24.5 62.0 28.0 70.0 31.5 78.0 35.0 86.0 39.2 96.0 43.4 107.0 Width ACfOS.3 Flats Head Height BOdY Diameter Max Min 5.48 4.52 6.19 5.52 8.58 7.42 10.58 9.42 12.70 11 -30 14.70 13.30 16.70 15.30 20.84 19.16 2484
