ASME_B18.2.9-2007.pdf

ASME B18.2.9-2007StraightnessGage andGaging for Boltsand ScrewsAN AMERICAN NATIONAL STANDARDThe American Society ofMechanical EngineersNot for ResaleDate of Issuance:May 11,2007This 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 thisStandard.Periodically certain actions of the ASME B18 Committee will 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 for public review and comment that provides an opportunity for additional public input from industry,academia,regulatory agencies,and the public-at-large.ASME does not approve,rate,or endorseany 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 10016-5990Copyright2o07byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.。with ASMENo roproduction or notworking permitled without liconso from IHSNot for ResaleCONTENTSForewordivCommittee Roster.Correspondence With the B18 Committeevi1Sc0pe1Comparison With ISO 4759-1:200013Referenced Standards.14Terminolo0gy.15Dimeni0n5.1Gage.11ProcedureFigures1Typical Straightness Gage.3Gaging2心so with ASMENo roproduction or notworking permitled without liconso from IHSNot for ResaloFOREWORDIn May 2001,the B18 Standards Committee authorized B18 Subcommittee 2,Externally DrivenFasteners,to proceed with the development of a Standard covering straightness gage and gagingfor bolts and screws.As a result,ASME B18.2.9 was approved by the B18 Standards Committeeand B18 Subcommittee 2 in April 2006.ASME B18.2.9-2007 was approved as an American National Standard on March 7,2007.iNo roproduction or notworking permitled without liconso from IHSNot for Resalo