1、AN AMERICA N NATIO NA L STA NDA RDSocket Cap,Shoulder,and Set Screws,Hex and Spline Keys(Inch Series)ASME B18.3-2003(Revision of ASME B18.3-1998)Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction
2、or distribution is permitted.Uncontrolled when printed.ASME B18.3-2003(Revision of ASME B18.3-1998)Socket Cap,Shoulder,andSet Screws,Hexand Spline Keys(Inch Series)AN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY 10016Copyrighted material licensed to Stanford University by Thomson Scientif
3、ic(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:April 29,2005The 2003 edition of this Standard is being issued with an automatic addenda subscription service.The use of addenda allows revisions
4、 made in response to public review comments or committeeactions to be published as necessary.This Standard will be revised when the Society approves theissuance of a new edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.Interpretations a
5、re published on the ASME Web site under the Committee Pages athttp:/www.asme.org/codes/as they are issued.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American NationalStan
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11、sher.The American Society of Mechanical EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2005 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford
12、 University User.No further reproduction or distribution is permitted.Uncontrolled when printed.CONTENTSForeword.ivCommittee Roster.viCorrespondence With the B18 Committee.vii1Introductory Notes.12General Data.2Figure1Optional Types of Cup Points.40Tables1ADimensions of Hexagon and Spline Socket Hea
13、d Cap Screws.31B-1Dimensions of Under Head Fillets for Socket Head Cap Screws Threadedto the Head.61B-2Dimensions of Under Head Fillets for Socket Head Cap Screws With anUnthreaded Length of Body Diameter.71CBody and Grip Lengths for Socket Head Cap Screws.81DLengths Beyond Sizes in Table 1C.111ESha
14、nk Straightness for Socket Head Cap Screws.121FDimensions of Drilled Hexagon Socket Head Cap Screws.141GDimensions of Low Head Hexagon Socket Cap Screws.162ADimensions of Hexagon and Spline Socket Flat Countersunk HeadCap Screws.182BBody and Grip Lengths for Socket Flat Countersunk Head Cap Screws.2
15、12CLengths Beyond Sizes in Table 2B.243Dimensions of Hexagon and Spline Socket Button Head Cap Screws.254Dimensions of Hexagon Socket Head Shoulder Screws.285ADimensions of Hexagon and Spline Socket Set Screws.325BHexagon Key Engagements for Short Length Set Screws.375CDimensions of Optional Cup Poi
16、nts.396Dimensions of Hexagon Sockets.417Dimensions of Spline Sockets.428Dimensions of Hexagon Keys and Bits.439Dimensions of Spline Keys and Bits.45Mandatory AppendicesIGages and Gaging for Hexagon and Spline Sockets.47IIProtrusion Gaging of Flat Countersunk Heads.50IIIStraightness Gage and Gaging.51Nonmandatory AppendicesADrill and Counterbore Sizes for Socket Head Cap Screws.52BApplicability of Keys and Bits to Various Socket Screw Types and Sizes.54CFormulas for Dimensions.56DHexagon and Spli