1、AN AMERICAN NATIONAL STANDARD Metric qound Head Square Neck Bolts ANSI/ASME B18.5.2.2M - 1982 c _ P REAFFIRMED 2000 FOR CURRENT COMMITTEE PERSONNEL PLEASE SEE ASME MANUAL AS1 1 Government Key Words: Bolt, Round Head, Square Neck - Metric SPONSORED AND PUBLISHED BY THE AMERICAN SOCIETY OF MECHANICAL
2、ENGINEERS United Engineering Center 345 East 47th Street New York, N. Y. 1 001 7 Date of Issuance: November 30,1982 This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The Consensus Committee that approved the code or standard was
3、balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. The proposed code or standard was made available for public review and comment which provides an opportunity for additional public input from industry, academia, regulatory agen- cies,
4、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 patent rights asserted in connection with any items mentioned in this document, and does not undertake t
5、o insure anyone utilizing a standard against liability for infringement of any applicable Letters Patent, nor assume any such liability. Users of a code or standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is ent
6、irely their own responsibility. Participation by federal agency representative(s1 or person(s) affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard. No part of this document may be reproduced in any form, in an electronic retrieval system o
7、r otherwise, without the prior written permission of the publisher. Copyright 0 1982 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Resewed Printed in USA. FOREWORD ASME Committee B18 for the standardization of bolts, screws, nuts, rivets, and similar fasteners was organized in March 192
8、2 as Sectional Committee B18 under the aegis of the American Engineering Stan- dards Committee (later the American Standards Association, the United States of America Standads Institute and, as of October 6, 1969, the American National Standards Institute, Incorporated), with the Society of Automoti
9、ve Engineers and the American Society of Mechanical Engineers as joint sponsors. Subcommittee 5 was subsequently established and charged with the responsibility for technical content of standards covering round, unslotted head bolts. At its meeting on December 4, 1974, Committee B18 authorized prepa
10、ration of a series of standards for metric fasteners. Subcommittee 5 was assigned responsibility for developing standards for metric round head bolts, including plow bolts. In December 1979, drafting of this Standard was started. The draft was circulated for letter ballot of Subcommittee 5 and Commi
11、ttee B18 in February, 1982. Following approval by Subcommittee 5 and Committee B18, this Standard was approved by the sponsor and submitted to the American National Standards Institute for designation as an American National Standard. This was granted on August 24, 1982. iii Intentionally left blank
12、 ASME STANDARDS COMMITTEE B18 STANDARDIZATION OF BOLTS, NUTS, RIVETS, SCREWS, WASHERS, AND SIMILAR FASTENERS OFFICERS J. B. Levy, Chairman H. W. Ellison, Vice-Chairman E. Schwartt. Vice-chairman R. McGinnit, Secretary COMMllTEE PERSONNEL AMERICAN SOCIETY OF AGRICULTURAL ENGINEERS E. R. Friesth, Coal
13、 Valley, Illinois AMERICAN SOCIETY OF MECHANICAL ENGINEERS, THE A. R. Machell, Jr., Xerox Corporation, Rochester, New York C. R. Adam, Alternate, Newport News Shipbuilding e.g., M10 is M10 x 1.5. 3 AN AMERICAN NATIONAL STANDARD METRIC ROUND HEAD SQUARE NECK BOLTS 25.2 The government part numbering s
14、ystem for metric round head square neck bolts is given in Appendix 111. This system may be used by any user needing a definitive part numbering system. 26 CLEARANCE HOLES The recommended sizes of clearance holes in ma- terial to be assembled using round head square neck bolts are the normal series g
15、iven in Appendix 11. ANSI/ASME 618.5.2.2M-1982 27 REFERENCED STANDARDS Copies of referenced ASTM standards may be ob- tained from the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pennsyl- vania 19103. Copies of referenced SAE standards may be ob- tained from the Societ
16、y of Automotive Engineers, Incorporated, 400 Commonwealth Drive, Wanendale, Pennsylvania 15096. 4 AN AMERICAN NATIONAL STANDARD METRIC ROUND HEAD SQUARE NECK BOLTS ANSllASME B18.5.2.2M-1982 t m t I AN AMERICAN NATIONAL STANDARD METRIC ROUND HEAD SQUARE NECK BOLTS ANSI/ASME 818.5.2.2M-1982 Nom. Dia.
17、and Thd. Pitch L Nominal Length 10 12 (14) 16 20 25 30 35 40 45 50 (55 1 60 (65) (75) (85 1 70 80 90 100 110 120 130 140 160 180 150 (1 70) (790) 200 220 240 M5 x 0.8 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 TABLE 2 MAXIMUM GRIP GAGING LENGTHS M6x 1 Lg Max. -_ 6.6 6.6 6.6 6.6 6.6 6.6 6.6 6.6 6.6
18、6.6 37.0 42.0 - M8 x 1.25 - 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 33.0 38.0 43.0 48.0 53.0 5 8.0 410 x 1.5 - - - - - - - 10.3 10.3 10.3 10.3 10.3 10.3 10.3 29.0 34.0 39.0 44.0 49.0 54.0 59.0 64.0 74.0 - - - - - - . M12x 1.75 M24x3 M2Ox2.5 M16x2 M14x2 -ciii-iii- 12.0 12.0 12.0 I 13.9 1 ii4: 1 18.4 22.1 25.
19、0 13.9 18.4 22.1 30.0 26.0 18.4 22.1 22.1 35.0 31 .O 27.0 18.4 50.0 I 46.0 I 42.0 I 34.0 I 22.1 62.0 54.0 46.0 72.0 64.0 56.0 82.0 74.0 66.0 86.0 78.0 70.0 90.0 - - - - - - - - 108.0 100.0 118.0 110.0 128.0 120.0 138.0 130.0 GENERAL NOTES: (1 ) Lg is grip gaging length. See 17.2. (2) Diameter-length
20、 combinations between the dashed lines are recommended. Lengths in parentheses are not recommended. (3) Bolts with lengths above the heavy solid line are threaded full length. (4) For bolts with lengths not shown, or below the lower dashed line, see 17.2.2. 6 AN AMERICAN NATIONAL STANDARD METRIC ROU
21、ND HEAD SQUARE NECK BOLTS TABLE 3 THREAD LENGTHS (B) Nominal Basic Thread Length (Ref) T Dia. and Thread Pitch Lengths Lengths M5 x 0.8 M6 x1 M8 x 1.25 MlOx 1.5 M12x 1.75 M14x2 M16x 2 M20 x 2.5 M24 x 3 46 54 22 24 28 32 36 40 44 52 60 Bolt Lengths 200 35 37 41 45 49 53 57 65 73 ANSllASME B18.5.2.2M-
22、1982 Bolts Threaded Full Length 11 Bolt Lengths to and Incl. 50 50 50 50 50 55 60 70 85 TABLE 4 LENGTH TOLERANCES - Lg Grip Gaging Length Max. 5.5 6.6 8.5 10.3 12.0 13.9 14.9 18.4 22.1 Nominal Length (mm) to 50 over 50 to 80 over 80 to 120 over 120 to 180 over 180 to 240 over 240 I Nominal Bolt Dia.
23、 M5 thru M8 M20 and M24 M10 thru M16 0.8 5.0 5.0 5.0 4.0 4.0 4.0 3.5 2.0 2.0 3.0 1.8 1.1 2.5 1.5 1 .o 2.0 1.3 Length tolerances are plus and minus. 7 AN AMERICAN NATIONAL STANDARD METRIC ROUND HEAD SQUARE NECK BOLTS ANSIIASME B18.5.2.2M-1982 TABLE 5 REDUCED DIAMETER BODY Nominal Bolt Dia. Dr and Thr
24、ead Pitch Dia. of Reduced Body Max. Min. M5 x 0.8 5.00 10.68 12.00 M12x 1.75 8.86 10.00 M10 x 1.5 7.04 8.00 M8 x 1.25 5.21 6.00 M6 x1 4.36 M14 x 2 M16 x 2 12.50 14.50 M20 x 2.5 20.00 18.1 6 M24 x 3 24.00 21.80 14.00 16.00 8 APPENDIX I GAGE AND GAGING FOR CHECKING BOLT STRAIGHTNESS The conformance of
25、 bolts to shank straightness or camber limitations set forth in the bolt specifications may be checked by use of the typical gage illustrated below in accordance with the following procedure: Allowable total camber on bolt to be inspected shall be calculated by multiplying the specified per- missibl
26、e camber per millimeter of length by the nom- inal bolt length expressed as a two-place decimal. The total camber thus derived shall be added to the speci- fied maximum body diameter and the movable rail of gage shall be adjusted to provide a parallel space be- Excluded permissible swell or fin on b
27、ody under the neck ofbolt tween the rails equal to this distance by obtaining common readings on both micrometer heads. The movable rail shall then be locked in place by tighten- ing securing screws. Bolt shall then be inserted between rails, exclud- ing from the gage any permissible length of swell
28、 or fm under the head or neck. Bolt shall next be rotated by hand through full 360 deg. Any interference occur- ring between the bolt and the gage which is sufficient to prevent rotation shall indicate excessive camber. /Reverse reading micrometer heads -, 9 APPENDIX II RECOMMENDED CLEARANCE HOLES F
29、OR METRIC ROUND HEAD SQUARE NECK BOLTS TABLE 11-1 CLEARANCE HOLE SIZES Rh Nominal Bolt Dia. and Thread Pitch M5 x 0.8 M6 X1 M8 x 1.25 MlOx 1.5 M12 x 1.15 M14x 2 M16 x 2 M20 x 2.5 M24 x 3 n Clearance Hole Diameter or Width (Square or Slotted) Rh Min. Corner Radius Normal Close Loose Clearance Clearan
30、ce Max. Clearance (Preferred) 5.5 . 0.6 14.5 13.5 13.0 0.4 12.0 11.0 . 0.4 10.0 9.0 . 0.3 7.0 . 6.6 0.2 5.8 15.0 11.0 21 .o 15.5 11.5 22.0 16.5 18.5 24.0 0.6 0.6 I 0.8 25.0 I 26.0 I 28.0 I 1.0 GENERAL NOTES: Close Clearance. Close clearance hole sizes should be specified only for square holes in ver
31、y thin and/or soft material, for slots, or where conditions such as critical alignment of assembled parts, wall thickness, or other limitations necessitate use of a minimal hole. Allowable swell or fins on the bolt body and/or fins on the corners of the square neck may inter- fere with close clearan
32、ce round and/or square holes. 10 Normal Clearance. Normal clearance hole sizes are preferred for general purpose applications, and should be specified unless special design considerations dic- tate the need for either a close or loose clearance hole. Loose Clearance. Loose clearance hole sizes shoul
33、d be specified only for applications where maximum adjustment capability between components being assembled is necessary. Loose clearance square holes or slots may not prevent bolt turning during wrend ing. APPENDIX 111 GOVERNMENT STANDARD ITEMS AND PART NUMBERING SYSTEM NOTE: The Government encoura
34、ges the general use of this Appendix to achieve maximum parts standard- ization. This Appendix establishes the standard items for Government application selected from the possible variations of items within the scope of the Standard and provides a part numbering system for identifica- tion and appli
35、cation in engineering documents. The following variations are standard: (a) Diameter/Thread Pitch and Length Combina- tions - as specified in Table 111-1. (b) Material - Steel, Property Class 9.8 for sizes up to and including M16 and Property Class 8.8 for sues M20 and M24. (c) Finish - Cadmium plat
36、ing or zinc p1,ating as coded in Part Numbering System. (d) Special Features - drilled shank as specified. The part number shall consist of the following ele- (a) Document Identifier - ANSI Standard Num- (b) Material and Finish (c) Nominal Diameter (d) Nominal Length (e) Special Features ment codes
37、in the order shown: ber less decimal point. Quality Assurance Provisions. Quality assurance pro- visions shall be in accordance with FF-B-584, Bolts, Finned Neck, Key Head, Machine, Ribbed Neck, Square Neck: Tee Head. Packaging. Packaging shall be in accordance with PPP-H-1581, Hardware (Fasteners a
38、nd Related Items) Packaging of. 11 PART NUMBERING SYSTEM COVERING STANDARD ITEMS FOR GOVERNMENT USE NOTE: THE GOVERNMENT ENCOURAGES THE GENERAL USE OF THIS SYSTEM TO ACHIEVE MAXIMUM PARTS STANDARDIZATION. B 18522 A 12 rnrn 100 N mrn MATERIAL AND FINISH CODE A - Steel wlcadrnium plating per QQ-P- 416
39、, Type 11, Class 3 (5.1p1-1 Plating Thickness), Property Class 8.8 or 9.8 as applicable. B - Steel wlzinc plating per QQ-2-325, Type II, Class 3 (5.lpm Thickness), Property Class 8.8 or 9.8 as applicable. SPECIAL FEATURE CODE N - None D - Drilled Shank EXAMPLE: B18522A12100N indicates a Bolt, Round
40、Head, Square Neck-Metric made of cadmium plated steel, property class 9.8, with M12 x 1.75 thread, 100 rnm in length, with no special feature. Nominal Length 10 12 16 20 25 30 35 40 45 50 60 70 80 90 100 110 120 130 140 150 160 180 200 220 240 - TABLE 111-1 METRIC ROUND HEAD SQUARE NECK BOLTS - STAN
41、DARD SIZES FOR GOVERNMENT USE Nominal Diameter and Thread Pitch MSx0.8 M6x1 M8x1.25 M24x3 M20x2.5 M16x2 M14x2 M12x1.75 M10x1.5 0501 0 08016 I STANDARD DIAMETER AND 24045 05 05 0 1 06060 4 08080 1 10100 1 Y 12120 LENGTH COMBINATION 14140 24240 13 Intentionally left blank Intentionally left blank AMER
42、ICAN NATIONAL STANDARDS FOR BOLTS. NUTS. RIVETS. SCREWS. WASHERS. AND SIMILAR FASTENERS Smd Solid Rivets . B18.1.1- 1972 (R1977) Large Rivets . B18.1.2-1972 (R1977) Square And Hex Bolts And Screws .B18.2. 1-1981 Square And Hex Nuts B 18.2.2- 1972 Metric Hex Cap Screws . B18.2.3.1M-1979 . Metric Form
43、ed Hex Screws B18.2.3.2M-1979 Metric Heavy Hex Screws B18.2.3.3M-1979 . Metric Hex Flange Screws B18.2.3.4M-1979 Metric Heavy Hex Bolts . B18.2.3.6M-1979 1; .- Metric Hex Bolts B18.2.3.5M-1979 Metric Heavy Hex Structural Bolts B18.2.3.7M-1979 Metric Hex Lag Screws B18.2.3.8M-1981 Metric Hex Nuts, St
44、yle 1 . B18.2.4.1M-1979 Metric Hex Nuts, Style 2 . B18.2.4.2M-1979 Metric Slotted Hex Nuts . B18.2.4.3M-1979 Metric Hex Flange Nuts . B18.2.4.4M-1982 Metric Hex Jam Nuts . B18.2.4.5M-1979 Metric Heavy Hex Nuts B18.2.4.6M-1979 Socket Cap, Shoulder And Set Screws-Inch Series B18.3-1982 Socket Head Cap
45、 Screws (Metric Series) B18.3.1M-1982 Metric Series Hexagon Keys And Bits . B18.3.2M-1979 Hexagon Socket Head Shoulder Screws: Metric Series B18.3.3M-1979 Hexagon Socket Button Head Cap Screws: Metric Series . B18.3.4M-1979 Metric Series Hexagon Socket Set Screws . B18.3.6M-1979 Round Head Bolts (In
46、ch Series) B18.5-1978 Metric Round Head Short Square Neck Bolts . B18.5.2.1M-1981 Wood Screws .B18.6. 1-1981 Slotted Head Cap Screws, Square Head Set Screws And Slotted Headless Set Screws . .B18.6. 2-1972 (R1977) Machine Screws And Machine Screw Nuts (M-4) . .B18.6. 3-1972 (R1977) Thread Forming An
47、d Thread Cutting Tapping Screws And Metallic Drive Screws (Inch Series) .B18.6. 4-1981 General Purpose Semi-Tubular Rivets, Full Tubular Rivets, Clevis Pins And Cotter Pins . .B18.8. 1-1972 (R1977) Taper Pins, Dowel Pins, Straight Pins, Grooved Pins And Spring Pins (Inch Series) . .B18.8. 2-1978 Tra
48、ck Bolts And Nuts B18.10-1963 (R1975) Miniature Screws . B18.11-1961 (R1975) Glossary Of Terms For Mechanical Fasteners B18.12-1962 (R1981) Screw And Washer Assemblies - Sems . B18.13-1965 (R1975) Mechanical And Performance Requirements For Prevailing-Torque Type Torque-Tension Test Requirements For
49、 Prevailing-Torque Type Dimensional Requirements For Prevailing-Torque Type Steel Metric Hex Nuts Wing Nuts, Thumb Screws And Wing Screws . B18.17-1968 (R1975) Lockwashers B18.21.1-1972 . Split Rivets And Rivet Caps B18.7-1972 (R1980) Plow Bolts B18.9-1958 (R1977) Forged Eyebolts B18.15-1969 Steel Metric Hex Nuts And Hex Flange Nuts . B18.16.1M-1979 Steel Metric Hex Nuts And Hex Flange Nuts . B18.16.2M-1979 And Hex Flange Nuts . B18.16.3M-1982 * . Plain Washers ._._. - _ . - ;.i * * * . .B18.22. 1-1965 (R1981) Metric Plain Washers . Beveled Washers . ! B18.23.
