2010_2017.pdf

AN AMERICAN NATIO NAL STANDARD ASME B18.29.1-2010Revision of ASME B18.29.1-1993(R2007)Helical Coil Screw Thread Inserts Free Running and Screw Locking(Inch Series)REAFFIRMED 2017INTENTIONALLY LEFT BLANKASME B18.29.1-2010Revision of ASME B18.29.1-1993(R2007)Helical Coil ScrewThread InsertsFreeRunning and ScrewLocking(Inch Series)AN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY 10016 USADate of Issuance:August 16,2010This Standard will be revised when the Society approves the issuance of a new edition.There willbe no addenda issued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisdocument.Periodically,certain actions of the ASME B18 Committee may be published as Cases.Cases and interpretations are published on the ASME Web site under the Committee Pages athttp:/cstools.asme.org 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 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 assume 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 2010 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the B18 Committee.vi1Introductory Notes.12STI Tapped Hole.23Helical Coil Insert.24Inspection and Quality Assurance.3Figure1Insert Configuration.5Tables1STI Threaded Hole Data.62Chemical Composition.93Insert Length Data.104Insert Dimensions.125Self-Locking Torque.14Nonmandatory AppendicesAInsert Length Selection.15BScrew Thread Insert Taps.16CSTI Thread Plug Gages.17DInstallation.18iiiFOREWORDAlthough this is the first ASME standard covering helical coil screw thread inserts,they havebeen in use for many years.The helical coil screw thread insert was invented in the 1930s andfound initial acceptance in aircraft manufactured and serviced by the Allied Air Forces duringWorld War II.Since that time,applications for helical coil inserts have come into broad usage in aerospace,automotive,and industrial original equipment design,production salvage(repair),and in-servicerepair.Althoughthisusagedidincludemetricsparkplugsizes,theregularmetricserieswasdelineatedin Europe in the 1950s,and came into production in the inch-using countries in the 1960s.Subcommittee 29,Threaded Inserts,met initially in May 1989 after authorization by the ASMEB18 Committee to proceed with development of standards covering screw thread inserts.FollowingapprovalbytheB18Committee,theproposalwassubmittedtotheAmericanNationalStandards Institute for approval.The 1993 edition was approved by ANSI on February 4,1993.In 2008,an update of this Standard was initiated by the ASME B18.29 Subcommittee.Afterneeded revisions and additions were clearly identified,ballots were properly undertaken.Ballotsresulted in changes related to the ballot comments.In 2009,this Standard was approved by theB18.29 Subcommittee and the B18 Committee.This revision was approved by the American National Standards Institute(ANSI)onFebruary 25,2010.ivASME B18 COMMITTEEStandardization 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.)STANDARDS COMMITTEE OFFICERSJ.Greenslade,ChairD.S.George,Vice ChairR.D.Strong,Vice ChairC.J.Gomez,SecretarySTANDARDS COMMITTEE PERSONNELV.Cartina,Autocraft IndustrialD.A.Clever,ConsultantA.P.Coc