ASME_B18.18-2017.pdf

AN AM E R IC AN NAT IO NAL STANDARDASME B18.18-2017(Revision of ASME B18.18-2011)Quality Assurance for FastenersASME B18.18-2017(Revision of ASME B18.18-2011)QualityAssurance forFastenersAN AMERICAN NATIONAL STANDARDTwo Park Avenue New York,NY 10016 USADate of Issuance:June 16,2017This 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 2017 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the B18 Committee.vi1General Information.12Basic Plan Requirements.13Category 1 Optional Receiving Inspection Plan for Purchasers.34Category 2 Fasteners Intended for General Purpose Applications.35Category 3 Fasteners Intended for Specialized Applications.46Category 4 Automated Assembly Fasteners.4Tables1Categories 2,3,and 4 Attributes.62Category 2 Sample Sizes.93Category 3 Sample Sizes.94Category 1 Attributes.10iiiFOREWORDThis Standard is intended to be used as part of a contractual agreement between sellers andbuyers of fasteners.It provides minimum criteria for four categories of metric and inch fastenersof any material type.It is to be used in concert with the specifications that apply to a given part.This Standard is intended to be a part within a larger quality assurance structure that addresseshighly specific elements of quality planning,material control,human resources,gaging andtesting,procedures,blueprintandstandardscontrol,andongoingimprovementsthatarenecessaryto permit the effective realization of the fastener itself.Such structures shall ideally be internation-ally recognized,but can be buyer specific.ThisStandardalsoprovidesminimumcriteriaformanufacturinginspectionandfinalinspectionand allows for the necessary measure of flexibility and ingenuity of manufacturing approachesthat suppliers may use as they comply with the standards requirements and end objectives.Itprovides reference material to enable buyers and sellers to make modifications to their plansshould they find that necessary in meeting the requirements of this Standard and those of theirbuyers.In the implementation of this Standard,buyers must become cognizant of the source of supplymanufacturing quality plan and use a means of their own to ens