ASME_B18.24-2020.pdf

Part IdentifyingNumber(PIN)CodeSystem Standard forB18 Fastener ProductsAN AM E R IC AN NAT IO NAL STANDARDASME B18.24-2020(Revision of ASME B18.24-2015)ASME B18.24-2020(Revision of ASME B18.24-2015)Part IdentifyingNumber(PIN)CodeSystem Standard forB18 Fastener ProductsAN AMERICAN NATIONAL STANDARDTwo Park Avenue New York,NY 10016 USAxDate of Issuance:October 30,2020This 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 this Standard.Interpretations arepublishedontheCommitteewebpageandunderhttp:/go.asme.org/InterpsDatabase.PeriodicallycertainactionsoftheASMEB18 Committee may be published as Cases.Cases are published on the ASME website under the B18 Committee Page athttp:/go.asme.org/B18committee as they are issued.Errata to codes and standards may be posted on the ASME website under the Committee Pages to provide corrections toincorrectlypublisheditems,ortocorrecttypographicalorgrammaticalerrorsincodesandstandards.Sucherratashallbeusedon the date posted.The B18 Committee Page can be found at http:/go.asme.org/B18committee.There is an option available to automaticallyreceive an e-mail notification when errata are posted to a particular code or standard.This option can be found on theappropriate Committee Page after selecting“Errata”in the“Publication Information”section.ASME is the registered trademark of The American Society of Mechanical Engineers.ThiscodeorstandardwasdevelopedunderproceduresaccreditedasmeetingthecriteriaforAmericanNationalStandards.TheStandardsCommitteethatapprovedthecodeorstandardwasbalancedtoassurethatindividualsfromcompetentandconcernedinterestshavehadanopportunityto participate.The proposed codeorstandardwasmadeavailable forpublic reviewandcommentthatprovidesanopportunityfor additional public input 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 any items mentioned in thisdocument,anddoesnotundertaketoinsureanyoneutilizingastandardagainstliabilityforinfringementofanyapplicableletterspatent,norassumeanysuchliability.Usersofacodeorstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtherisk of infringement of such rights,is entirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted as government or industryendorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME proceduresand 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 2020 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.viCommittee Roster.viiCorrespondence With the B18 Committee.viii1Introductory Notes.12General Guidance.13PIN Code Structure.2Tables1-1Fastener Family and Type/Base PIN.42-1Thread Type.252-2Thread and Point Options for Tapping Screws.253-1Inch Thread.253-2Inch Size.253-3Metric Thread.263-4Metric Size.273-5Miniature Screw Thread.283-6Inch Tapping Screw Thread.283-7Metric Tapping Screw Thread.293-8Inch Hex Socket Head Shoulder Screw Size.293-9Metric Hex Socket Head Shoulder Screw Size.293-10Inch Spline Socket Set Screw Thread.293-11Inch Trim Head Machine Screw Size.293-12Inch Wood Screw Thread.303-13Inch Lag Screw Thread.303-14Inch Rivet Size Weight.303-15Inch Rivet Size Number.303-16Inch Rivet Size 1.303-17Inch Rivet Size/Length.303-18Inch Pin Size 1.313-19Inch Pin Size 2.313-20Retaining Ring Size Number.313-21Inch Retaining Ring Size.333-22Inch Washer Size 1.343-23Inch Washer Size 2.353-24Inch Washer Size 3.353-25Inch Washer Size 4.363-26Metric Washer Size 1.363-27Metric Washer Size 2.373-28Metric Key Size 1.373-29Metric Key Size 2.384-1Inch Length/Other.384-2Metric Length/Other.404-3Inch Miniature Screw Length.414-4Insert Length.424-5Inch Pin Length.424-6Inch Eyebolt Full Thread Length.425-1Material and Treatment:ASTM Material Specifications.435-2Material and Treatment:UNS Carbon and Alloy Steels.825-3Material and Treatment:UNS Heat and Corrosion Resisting Steels.88iii5-4Material and Treatment:UNS Nonferrous Materials.935-5Material and Treatment:SAE Material Specifications.965-6Material and Treatment:ISO Material Specifications.975-7Material and Treatment:IFI Material Specifications.985-8Material and Treatment:B18.16.1M.985-9Material and Treatment:B18.6.6.986-1Plating,Coating,and Passivation:Plain,Unfinished.996-2Plating,Coating,and Passivation:A