1、STD.ASME 81862-ENGL 1998 II 0759670 0608543 6T9 II STD.ASME 818.6.2-ENGL 1998 II 0759670 0608544 535 II The American Society of Mechanical Engineers AN AMERICAN NATIONAL STANDARD SLOTTED HEAD CAP SCREWS, SQUARE HEAD SET SCREWS, AND SLOTTED HEADLESS SET SCREWS ONCH SERIES) ASME 818.8.21 998 Revision
2、of ANSI 818.8.2-1972 (R1993) STD.ASME 818-6.2-ENGL 1998 II 0759670 0608545 471 II Date of Issuance: April 30, 1999 This Standard will be revised when the Society approves the issuance of a new edition. There will be no addenda issued to this edition. ASME is the registered trademark of The American
3、Society of Mechanical Engineers. This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The Standards Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had
4、 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 agencies, and the public-at-large. ASME does not “approve,“ “rate,“ or “endorse“ any item, con
5、struction, 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 to insure anyone utilizing a standard against liability for infringement of any appli
6、cable 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 entirely their own responsibility. Participation by federal agency representative(s) or
7、 person(s) affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard. ASME accepts responsibility for only those interpretations issued in accordance with governing ASME procedures and policies which preclude the issuance of interpretations by i
8、ndividual volunteers. 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. The American Society of Mechanical Engineers Three Park Avenue, New York, NY 10016-5990 Copyright 1999 by THE AMERICAN
9、SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A. STD.ASME 81862-ENGL 1998 0759670 0608546 308 FOREWORD (This Foreword is not part of ASME 818.6.2-1998.) American National Standards Committee B 18 for the standardization of bolts, screws, nuts, rivets, and similar fasteners was o
10、rganized in March 1922, as Sectional Committee B 18 under the American Engineering Standards Committee1, with the Society of Automotive Engineers and the American Society of Mechanical Engineers as joint sponsors. Subcommittee 32 was subsequently established and charged with the responsibility for t
11、echnical content of standards covering slotted and recessed head screws. Over the years following the issuance of this document, the need for standards more comprehensive than head configurations became apparent. At a meeting held on April 14, 1942, Subcommittee 32 was reorganized and enlarged, and
12、the following operating scope was established. The scope of Subcommittee 32 shall consist of the development and promulgation of American Standards embracing screw products variously known as machine screws, wood screws, tapping screws, slotted head cap screws, slotted headless set screws, and machi
13、ne screw nuts. The standards shall comprise complete product standards covering all dimensions and tolerances required for the specification and production of the products. Details shall include such boundary dimensions as nut width and thickness; screw head dimensions; slot and recess dimensions; b
14、ody dimensions; thread classification or thread detail, as required; thread length; point design; chamfers; underhead fillets; and supporting general specifications covering the quality, finish, and the acceptable tolerances and limits as well as any information that may be necessary to ensure satis
15、factory application of the products. This Standard was developed and declared an American Standard, ASA B18.6, on April 12, 1947. At the April 1954 meeting, Subcommittee 32, contemplating a partial revision of the ASA B 18.6 document, recommended the publication of standards for wood screws. cap and
16、 set screws, machine screws, and tapping and drive screws in four separate documents, each of which would consist of a complete product specification. This approach was confirmed by the B 18 Committee with the further stipulation that the coverage for hexagon head cap screws, square head set screws,
17、 and machine screw nuts from the ASA B 18.2 standard be transferred to the documents covering cap and set screws and machine screws, respectively. It was understood that jurisdiction over the square head set screws and hexagon head cap screws would remain with Subcommittee 2 and that Subcommittee 32
18、 would retain responsibility for machine screw nuts. Following this confirmation and additional direction, proposals for the new documents were prepared. The proposed standard combining the coverage for hexagon head cap screws and square head set screws from ASA B 18.2-1952 with updated specificatio
19、ns for slotted head cap screws and slotted headless screws from B 18.6-1947 was developed and found acceptable by both subcommittees. After approval by letter ballot of the B 18 Committee and the sponsor organizations, the proposal was submitted to the American Standards Association 1 As of October
20、9, 1969, the American Engineering Standards Committee was redesignated the American National Standards Institute, Inc. 2 As of April I, 1996, Subcommittee 3 was redesignated Subcommittee 6. iii STD.ASME 818-6-2-ENGL 1998 II 0759670 0608547 244 II for recognition. It was formally designated an Americ
21、an Standard, ASA B 18.6.2, in June 1956, superseding in part the parent documents. The document was revised further in 1961. After several years of development, and following approval by letter ballot of the B 18 Standards Committee and sponsor organizations, this proposal was submitted to the Ameri
22、can National Standards Institute for designation as an American National Standard. This was granted on January 28, 1972. In 1990 Subcommittee 6 initiated work to revise para. 3.6.1 for square head set screws. Several drafts that were prepared resulted in further refinements for dimensional conforman
23、ce, designation, and material for all products. These changes were balloted and approved by the ASME B 18 Committee. The proposal was submitted to the American National Standards Institute and designated an American National Standard on August 6, 1998. iv STD.ASME 818.6-2-ENGL 1998 0759670 0608548 1
24、80 ASME 818 STANDARDS COMMITTEE Standardization of Bolts, Nuts, Rivets, Screws, Washers, and Similar Fasteners (The following is the roster of the Committee at the time of approval of this Standard.) OFFICERS D. A. Clever, Chair R. D. Strong, Vice Chair S. W. Vass, Vice Chair R. L. Crane, Secretary
25、COMMITTEE PERSONNEL J. C. Akins, Safety Socket Screw Corp. J. Altman, Rotor Clip Co. J. H. Slass, Alternate, Rotor Clip Co. J. B. Belford, Lawson Products, Inc. J. A. Buda, SPS Technologies D. A. Clever, Deere and Co. A. P. Cockman, Ford Motor Co. T. Collier, Cam-Tech Industries, Inc. R. L. Crane, T
26、he American Society of Mechanical Engineers A. C. DiCola, Wrought Washer Manufacturing, Inc. A. Dinh, Defense Industrial Supply Center W. D. Downing, Consultant B. A. Dusina, Federal Screw Works D. S. George, Ford Motor Co. B. Hasiuk, Defense Industrial Supply Center A. C. Hood, ACH Technologies J.
27、Hubbard, Rockford Fastener, Inc. F. W. Kern, The Society of Automotive Engineers W. H. Kopke, ITW Shakeproof Industrial Products J. G. Langenstein, Consultant M. Levinson, ITW Shakeproof Industrial Products L. L. lord, Caterpillar, Inc. A. D. McCrindle, Genfast Manufacturing Co. K. E. McCullough, Co
28、nsultant R. F. Novotny, Textron M. D. Prasad, General Motors Corp. W. Schevey, BGM Fastener Co., Inc. R. D. Strong, General Motors Corp. J. F. Sullivan, National Fasteners Distribution Association R. L. Tennis, Caterpillar, Inc. S. W. Vass, Industrial Fasteners Institute R. G. Weber, Fairfield Unive
29、rsity C. J. Wilson, Industrial Fasteners Institute y STD.ASME 818.6-2-ENGL 1998 0759670 0608549 017 SUBCOMMITTEE 6-SLOTTED AND RECESSED HEAD SCREWS R. D. Strong, Chair, General Motors Corp. D. Broomfield, Illinois Tool Worlcs, Inc. D. A. Clever, Deere and Co. A. Dinh, Defense Industrial Supply Cente
30、r J. Greenslade, Greenslade and Co. A. Herskovitz, U.S. Army ARDEC M. W. Holubecki, Electric Boat Corp. J. Hubbard, Rockford Fastener, Inc. R. W. Kerr, Kerr Lakeside, Inc. R. F. Novotny, Textron J. A. Schlink, Caterpillar, Inc. J. F. Sullivan, National Fasteners Distribution Association C. B. Wackro
31、w, MNP Corp. C. J. Wilson, Industrial Fasteners Institute vi STD.ASME 81862-ENGL 1998 0759670 0608550 839 CORRESPONDENCE WITH THE 818 COMMITIEE General. ASME Standards are developed and maintained with the intent to represent the consensus of concerned interests. As such, users of this Standard may
32、interact with the Committee by requesting interpretations, proposing revisions, and attending Committee meetings. Correspondence should be addressed to: Secretary, B 18 Main Committee The American Society of Mechanical Engineers Three Park A venue New York, NY 10016-5990 Proposing Revisions. Revisio
33、ns are made periodically to the Standard to incorporate changes that appear necessary or desirable, as demonstrated by the experience gained from the application of the Standard. Approved revisions will be published periodically. The Committee welcomes proposals for revisions to this Standard. Such
34、proposals should be as specific as possible, citing the paragraph number(s), the proposed wording, and a detailed description of the reasons for the proposal, including any pertinent documentation. Interpretations. Upon request, the B 18 Committee will render an interpretation of any requirement of
35、the Standard. Interpretations can only be rendered in response to a written request sent to the Secretary of the B 18 Main Committee. The request for interpretation should be clear and unambiguous. It is further recommtJ: zm ol C/)0 r-0 Ol :j“tl mCil on :0 :rm m:E )(/) o Cil 0 (J)C (/) m:o -lm (/):I
36、: om :;ol mO :EC/) (J)m -l ) (/) s: m m 00 0 i;- r.-1 :3: , OJ 1:- J: lr nJ I , z G“o r 1:- _IJ _n J: I Cl -.1 Ln _n lr -.1 Cl CJ lr Cl J: Ln U1 lr nJ U1 . I STD.ASME 818.6.2-ENGL 1998 0759670 0608557 193 ASME 818.6.2-1998 SLOTIED HEAD CAP SCREWS, SQUARE HEAD SET SCREWS, AND SLOTIED HEADLESS SET SCR
37、EWS K Optional Head Constructions TABLE 4 DIMENSIONS OF SQUARE HEAD SET SCREWS Nominal Neck Size Relief Neck Note (111 Width Across Width Across Head Neck Relief Fillet Relief or Flats, Corners, Height, Diameter, Radius, Width, Basic F G H K s u Screw Diameter Max. Min. Max. Min. Max. Min. Max. Min.
38、 Max. Min. 10 0.1900 0.188 0.180 0.265 0.247 0.148 0.134 0.145 0.140 0.027 0.083 v. 0.2500 0.250 0.241 0.354 0.331 0.196 0.178 0.185 0.170 0.032 0.100 5;,6 0.3125 0.312 0.302 0.442 0.415 0.245 0.224 0.240 0.225 0.036 0.111 % 0.3750 0.375 0.362 0.530 0.497 0.293 0.270 0.294 0.279 0.041 0.125 7/16 0.4
39、375 0.438 0.423 0.619 0.581 0.341 0.315 0.345 0.330 0.046 0.143 12 0.5000 0.500 0.484 0.707 0.665 0.389 0.361 0.400 0.385 0.050 0.154 9/16 0.5625 0.562 0.545 0.795 0.748 0.437 0.407 0.454 0.439 0.054 0.167 % 0.6250 0.625 0.606 0.884 0.833 0.485 0.452 0.507 0.492 0.059 0.182 3;4 0.7500 0.750 0.729 1.
40、060 1.001 0.582 0.544 0.620 0.605 0.065 0.200 7;8 0.8750 0.875 0.852 1.237 1.170 0.678 0.635 0.731 0.716 0.072 0.222 1 1.0000 1.000 0.974 1.414 1.337 0.774 0.726 0.838 0.823 0.081 0.250 1ls 1.1250 1.125 1.096 1.591 1.505 0.870 0.817 0.939 0.914 0.092 0.283 114 1.2500 1.250 1.219 1.768 1.674 0.966 0.
41、908 1.064 1.039 0.092 0.283 1% 1.3750 1.375 1.342 1.945 1.843 1.063 1.000 1.159 1.134 0.109 0.333 1% 1.5000 1.500 1.464 2.121 2.010 1.159 1.091 1.284 1.759 0.109 0.333 GENERAL NOTE: For additional requirements refer to Section 3, titled General Data for Square Head Set Screws. NOTE: Head Radius, w M
42、in. 0.48 0.62 0.78 0.94 1.09 1.25 1.41 1.56 1.88 2.19 2.50 2.81 3.12 3.44 3.75 ( 1) Where specifying nominal size in decimals, zeros preceding the decimal and in the fourth decimal place shall be omit1ed. 6 STD.ASME 818.6.2-ENGL 1998 II 0759670 0608558 02T II SLOTTED HEAD CAP SCREWS, SQUARE HEAD SET
43、 SCREWS, AND SLOTTED HEADLESS SET SCREWS ASME 618.6.2-1998 Slight fillet permissible -L -L -L X SeeNote(1) +5 deg. +5 deg. t C Snght ohmf“ oc “ P 0 radius permissible Flat Point Dog Point Half-Dog Point Slight flat or rounding 71nnmrm permissible Slight flat or rounding permissible See Note (2) _ _J
44、 Cup Point Oval Point Cone Point TABLE 4 DIMENSIONS OF SQUARE HEAD SET SCREWS (CONTD) Cone Point Angle: Oval 90 deg. :t 2 deg. Nominal for These Size Cup and Flat Dog and Point Nominal Lengths (Note (3) Point Half-Dog Point Point Length Radius, or Longer; or Diameters, Diameters, Dog, Half-Dog, R 11
45、8 deg. :t 2 deg. Basic Screw c p a a, +0.031 for Shorter Diameter Max. Min. Max. Min. Max. Min. Max. Min. -0.000 Screws, Y 10 0.1900 0.102 0.088 0.127 0.120 0.095 0.085 0.050 0.040 0.142 % 1;4 0.2500 0.132 0.118 0.156 0.149 0.130 0.120 0.068 0.058 0.188 5/16 s;16 0.3125 0.172 0.156 0.203 0.195 0.161
46、 0.151 0.083 0.073 0.234 % % 0.3750 0.212 0.194 0.250 0.241 0.193 0.183 0.099 0.089 0.281 7/16 7/16 0.4375 0.252 0.232 0.297 0.287 0.224 0.214 0.114 0.104 0.328 % % 0.5000 0.291 0.270 0.344 0.334 0.255 0.245 0.130 0.120 0.375 9/16 9;16 0.5625 0.332 0.309 0.391 0.379 0.287 0.275 0.146 0.134 0.422 % %
47、 0.6250 0.371 0.347 0.469 0.456 0.321 0.305 0.164 0.148 0.469 % % 0.7500 0.450 0.425 0.562 0.549 0.383 0.367 0.196 0.180 0.562 7/s 7;8 0.8750 0.530 0.502 0.656 0.642 0.446 0.430 0.227 0.211 0.656 1 1 1.0000 0.609 0.579 0.750 0.734 0.510 0.490 0.260 0.240 0.750 1% 1% 1.1250 0.689 0.655 0.844 0.826 0.
48、572 0.552 0.291 0.271 0.844 1% 1% 1.2500 0.767 0.733 0.938 0.920 0.635 0.615 0.323 0.303 0.938 1% 1% 1.3750 0.848 0.808 1.031 1.011 0.698 0.678 0.354 0.334 1.031 1% 11/2 1.5000 0.926 0.886 1.125 1.105 0.760 0.740 0.385 0.365 1.125 1% GENERAL NOTE: For additional requirements refer to Section 3, titl
49、ed General Data for Square Head Set Screws. NOTES: (1) Point angle X shall be 45 deg. plus 5 deg., minus 0 deg. for screws of nominal lengths equal to or longer than those listed for variable Y, and 30 deg. minimum for screws of shorter nominal lengths. (2) The extent of rounding or flat at the apex of the cone point shall not exceed an amount equivalent to 10% of the basic screw diameter. (3) Where specifying nominal size in decimals, zeros preceding the decimal and in the fourth decimal place shall be omitted. 7 00 Slight fillet permissible L(fse
