Socket Cap, Set Screws, Hex and Spline Keys (Inch …

1 AN AMERICAN NATIONAL standards ocket Cap, Shoulder, and Set Screws, Hex and Spline Keys (Inch Series)ASME (Revision of ASME )Copyright ASME International Provided by IHS under license with ASME Sold to:MARIA BARTON, W0379740 Not for Resale,2007/1/10 16:36:16 GMTNo reproduction or networking permitted without license from IHS--`,```,,`,``,`,```,,-`-`,,`,,`,`,,`- --ASME (Revision of ASME ) Socket Cap,Shoulder, andSet Screws, Hexand Spline Keys (Inch Series)AN AMERICAN NATIONAL STANDARDT hree Park Avenue New York, NY 10016 Copyright ASME International Provided by IHS under license with ASME Sold to:MARIA BARTON, W0379740 Not for Resale,2007/1/10 16:36:16 GMTNo reproduction or networking permitted without license from IHS--`,```,,`,``,`,```,,-`-`,,`,,`,`,,`- --Date of Issuance: April 29, 2005 The 2003 edition of this Standard is being issued with an automatic addenda subscription use of addenda allows revisions made in response to public review comments or committeeactions to be published as necessary.

2 This Standard will be revised when the Society approves theissuance of a new issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Interpretations are published on the ASME Web site under the Committee Pages as they are is the registered trademark of The American Society of Mechanical code or standard was developed under procedures accredited as meeting the criteria for American NationalStandards. The standards Committee that approved the code or standard was balanced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate. The proposed code or standard was madeavailable for public review and comment that provides an opportunity for additional public input from industry, academia,regulatory agencies, and the does not approve, rate, or endorse any item, construction, proprietary device, or does not take any position with respect to the validity of any patent rights asserted in connection with anyitems mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent, nor assume any such liability.

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4 NY 10016-5990 Copyright 2005 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in ASME International Provided by IHS under license with ASME Sold to:MARIA BARTON, W0379740 Not for Resale,2007/1/10 16:36:16 GMTNo reproduction or networking permitted without license from IHS--`,```,,`,``,`,```,,-`-`,,`,,`,`,,` With the B18 Types of Cup of Hexagon and Spline Socket Head Cap of Under Head Fillets for Socket Head Cap Screws Threadedto the of Under Head Fillets for Socket Head Cap Screws With anUnthreaded Length of Body and Grip Lengths for Socket Head Cap Beyond Sizes in Table Straightness for Socket Head Cap of Drilled Hexagon Socket Head Cap of Low Head Hexagon Socket Cap of Hexagon and Spline Socket Flat Countersunk HeadCap Screws.

5 182 BBody and Grip Lengths for Socket Flat Countersunk Head Cap Beyond Sizes in Table of Hexagon and Spline Socket Button Head Cap of Hexagon Socket Head Shoulder of Hexagon and Spline Socket Set Key Engagements for Short Length Set of Optional Cup of Hexagon of Spline of Hexagon Keys and of Spline Keys and AppendicesIGages and Gaging for Hexagon and Spline Gaging of Flat Countersunk Gage and AppendicesADrill and Counterbore Sizes for Socket Head Cap of Keys and Bits to Various Socket Screw Types and for and Spline Socket Head Cap Screws (1936 Series)..58iiiCopyright ASME International Provided by IHS under license with ASME Sold to:MARIA BARTON, W0379740 Not for Resale,2007/1/10 16:36.

6 16 GMTNo reproduction or networking permitted without license from IHS--`,```,,`,``,`,```,,-`-`,,`,,`,`,,`- --FOREWORDA merican National standards Committee B18 for thestandardization of bolts, screws, nuts, rivets, and similarfasteners was organized in March 1922 as Sectional Com-mittee B18 under the aegis of the American EngineeringStandards Committee (later the American StandardsAssociation, then the United States of America Stan-dards Institute and, as of October 6, 1969, the AmericanNational standards Institute) with the Society of Auto-motive Engineers and the American Society of Mechani-cal Engineers as joint No. 91on Socket Head Cap and SetScrews was organized in April 1929 and completed itsfirst report in November 1931.

7 Seven successive draftswere issued during which the content of the proposalwas considerably extended and refined, and in March1933 copies were distributed to industry for criticismand comment. The suggestions received were carefullyreviewed, and in April 1935 the proposal was presentedto the members of Sectional Committee B18 for letterballot vote. Following the acceptance by the two sponsororganizations, it was designated an American Standard(ASA ) in February 1936 by the American Stan-dards the purpose of keeping the work of the Subcom-mittee in line with the developments in industry, theCommittee prepared a supplement to the standard inthe form of a table covering the dimensions of hexagonaland fluted Socket head shoulder screws (stripper bolts)

8 Optional, which received approval of the American Stan-dards Association in April 1944 and was designatedASA March 1945, the Subcommittee submitted certainfundamental changes and additions to the Standard,and the Sectional Committee recommended issuance ofa completely revised standard. Following approval ofthe Sectional Committee, the revised document wasapproved by the sponsor organizations and the Ameri-can standards Association and designated an AmericanStandard in April accordance with ASA procedure, a review of thestandard was undertaken in 1950 and certain additionalchanges were recommended by the Subcommittee. Capscrew sizes No. 0 and 1 and set screw sizes No.

9 0, 1, 2,3, and 4 were added to satisfy increasing demand fromvarious industries. Material, hardness, and thread fitwere included to provide a more complete standard. Adraft dated November 1951 was distributed to industry1As of April 1, 1966, Subcommittee 9 was redesignated as Sub-committee criticism and comment. A further revision, datedNovember 1953, was presented to Sectional CommitteeB18 for letter ballot vote. Following approval of the Sec-tional Committee and sponsors, the proposal was sub-mitted to the American standards Association. It wasapproved and designated an American Standard onAugust 26, after the 1954 standard was issued, work wasinitiated on the development of standards covering flatcountersunk head cap screws, button head cap Screws, and cap screws up to 4 in.

10 In diameter. As these proposalsevolved with comments received from various indus-tries, it became evident that a major revision wasrequired, particularly in regard to insufficient bearingsurface under the head on some sizes as well as increasedsocket sizes to permit higher set-up torque. The resultingproposed revision was presented to Sectional Commit-tee B18 for letter ballot vote. Following approval of theSectional Committee and sponsors, the proposal wassubmitted to the American standards Association. Itwas approved and designated an American Standardon December 21, surveillance of the 1961 standard by theSubcommittee indicated by 1966 that a complete revi-sion of the document was necessary to provide recogni-tion of technical improvements in materials andmanufacturing methods.