-6-3_Edtn_2003.pdf

AN AMERICAN NATIO NAL STANDARDMachine Screws and Machine Screw NutsASME B18.6.3-2003(Revision of ASME B18.6.3-1998)Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.ASME B18.6.32003(Revision of ASME B18.6.31998)Machine Screwsand MachineScrew NutsAN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY 10016Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:June 30,2005The 2003 edition of this Standard is being issued with an automatic addenda subscription service.The use of addenda allows revisions 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 are published on the ASME Web site under the Committee Pages at http:/www.asme.org/codes/as they are issued,and will also be published within the next edition of theStandard.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 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 forpublic review andcomment thatprovides an opportunityfor additional publicinput from industry,academia,regulatory agencies,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 anyitems mentioned in this document,and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent,nor assumes any such liability.Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights,and the risk of infringement of such rights,isentirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establishedASME procedures and policies,which precludes the issuance of interpretations by individuals.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 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 University User.No further reproduction or distribution is permitted.Uncontrolled when printed.CONTENTSForeword.viCommittee Roster.viiiCorrespondence With the B18 Committee.x1Introductory Notes.12General Data.23References.4Tables1ADimensions of Slotted Flat Countersunk Head Machine Screws.61BDimensions of Type I Cross Recessed Flat Countersunk Head MachineScrews.71CDimensions of Type IA Cross Recessed Flat Countersunk HeadMachine Screws.81DDimensions of Type II Cross Recessed Flat Countersunk Head MachineScrews.91EDimensions of Type III Square Recessed Flat Countersunk HeadMachine Screws.102ADimensions of Slotted 100 deg Flat Countersunk Head MachineScrews.112BDimensions of Type I Cross Recessed 100 deg Flat Countersunk HeadMachine Screws.122CDimensions of Type IA Cross Recessed 100 deg Flat Countersunk HeadMachine Screws.132DDimensions of Type II Cross Recessed 100 deg Flat Countersunk HeadMachine Screws.143ADimensions of Slotted Close Tolerance 100 deg Flat Countersunk HeadMachine Screws.153BDimensions of Type I Cross Recessed Close Tolerance 100 deg FlatCountersunk Head Machine Screws.163CDimensions of Type IA Cross Recessed Close Tolerance 100 degFlat Countersunk Head Machine Screws.173DDimensions of Type II Cross Recessed Close Tolerance 100 deg FlatCountersunk Head Machine Screws.184ADimensions of Slotted Oval Countersunk Head Machine Screws.204BDimensions of Type I Cross Recessed Oval Countersunk Head MachineScrews.224CDimensions of Type IA Cross Recessed Oval Countersunk HeadMachine Screws.244DDimensions of Type II Cross Recessed Oval Countersunk HeadMachine Screws.264EDimensions of Type III Square Recessed Oval Countersunk HeadMachine Screws.285ADimensi