COPYRIGHTAmericanSocietyofMechanicalEngineersLicensedbyInformationHandlingServicesCOPYRIGHTAmericanSocietyofMechanicalEngineersLicensedbyInformationHandlingServicesTheAmericanSocietyofMechanicalEngineersANAMERICANNATIONALSTANDARDMETRICHEXCAPSCREWSASMEB18mL3mlM-Ifill[Revision01ANSII18.2.3.1M-1979(RlNfl5)]COPYRIGHTAmericanSocietyofMechanicalEngineersLicensedbyInformationHandlingServicesCOPYRIGHTAmericanSocietyofMechanicalEngineersLicensedbyInformationHandlingServicesDateofIssuance:December31,1999The1998editionofthisStandardisbeingissuedwithanautomaticaddendasubscriptionservice.Theuseofanaddendaallowsrevisionsmadeinresponsetopublicreviewcommentsorcommitteeactionstobepublishedasnecessary.ThenexteditionofthisStandardisscheduledforpublicationin2004.ASMEistheregisteredtrademarkofTheAmericanSocietyofMechanicalEngineers.ThiscodeorstandardwasdevelopedunderproceduresaccreditedasmeetingthecriteriaforAmericanNationalStandards.TheStandardsCommitteethatapprovedthecodeorstandardwasbalancedtoassurethatindividualsfromcompetentandconcernedinterestshavehadanopportunitytoparticipate.Theproposedcodeorstandardwasmadeavailableforpublicreviewandcommentthatprovidesanopportunityforadditionalpublicinputfromindustry,academia,regulatoryagencies,andthepublic-at-large.ASMEdoesnot"approve,""rate,"or"endorse"anyitem,construction,proprietarydevice,oractivity.ASMEdoesnottakeanypositionwithrespecttothevalidityofanypatentrightsassertedinconnectionwithanyitemsmentionedinthisdocument,anddoesnotundertaketoinsureanyoneutilizingastandardagainstliabilityforinfringementofanyapplicableletterspatent,norassumeanysuchliability.Usersofacodeorstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,isentirelytheirownresponsibility.Participationbyfederalagencyrepresentativeb)orperson(s)affiliatedwithindustryisnottobeinterpretedasgovernmentorindustryendorsementofthiscodeorstandard.ASMEacceptsresponsibilityforonlythoseinterpretationsofthisdocumentissuedinacc...
