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ASME_B18
31.3
2014
AN AM E R IC AN NAT IO NAL STANDARDASME B18.31.3-2014(Revision of ASME B18.31.3-2009)Threaded Rods(Inch Series)ASME B18.31.3-2014(Revision of ASME B18.31.3-2009)Threaded Rods(Inch Series)AN AMERICAN NATIONAL STANDARDTwo Park Avenue New York,NY 10016 USADate of Issuance:March 12,2015This Standard will be revised when the Society approves the issuance of a new edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.InterpretationsarepublishedontheCommitteeWebpageandundergo.asme.org/InterpsDatabase.Periodically certain actions of the ASME B18 Committee may bepublished as Cases.Cases are published on the ASME Web site under the B18 Committee Page atgo.asme.org/B18committee as they are issued.Errata to codes and standards may be posted on the ASME Web site under the Committee Pages toprovide corrections to incorrectly published items,or to correct typographical or grammatical errorsin codes and standards.Such errata shall be used on the date posted.The B18 Committee Page can be found at go.asme.org/B18committee.There is an option availableto automatically receive an e-mail notification when errata are posted to a particular code or standard.ThisoptioncanbefoundontheappropriateCommitteePageafterselecting“Errata”inthe“PublicationInformation”section.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 EngineersTwo Park Avenue,New York,NY 10016-5990Copyright 2015 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the B18 Committee.vi1Introduction.12General Data.1Figure1Threaded Rod Dimensions.2Table1Inch Threaded Rod Sizes.3iiiFOREWORDThere was significant interest in developing this Standard due to the antidumping investigationby the U.S.Department of Commerce and the U.S.International Trade Commission that washappening simultaneously.The investigation resulted in antidumping tariffs being applied to asignificant portion of threaded rod that is used in the United States.Members of the subcommitteerecognized that there would be a lot of new threaded rod manufacturers appearing in the marketand that the industry needed a standard to reference on purchasing documents.The FastenerIndustry Education Group cites referencing standards as one of the most important criteria forpreventing poor quality or wrong product from entering the supply chain.The first edition of this Standard was approved as an American National Standard onNovember 10,2009.This revision incorporates the following technical changes.For quality assurance,ASME B18.18replaces the superseded ASME B18.18.2.Additional materials for threaded rod have been addedand provision is made to allow users to order materials not specifically covered.Stainless steelis used to identify corrosion-resistant steel fasteners previously identified as CRES.ASTM F1554,Grade 105 that is increasingly replacing ASTM A449 has been added.ASTM A354 and SAE J429,Grade 8 covering higher-strength steels were added.Hot-dip zinc coating in accordance withASTM F2329 was added as a finish choice.A statement has been added that tensile and yieldtests can be conducted on specimens of 3 nominal diameters or greater in length as some of thereferenced material specifications may require testing of full le