SAE-J-1231-2004

SURFACEVEHICLESTANDARDFormedTubeEndsforHoseConnectionsandHoseFittingsSAETechnicalStandardsBoardRulesprovidethat:“ThisreportispublishedbySAEtoadvancethestateoftechnicalandengineeringsciences.Theuseofthisreportisentirelyvoluntary,anditsapplicabilityandsuitabilityforanyparticularuse,includinganypatentinfringementarisingtherefrom,isthesoleresponsibilityoftheuser.”SAEreviewseachtechnicalreportatleasteveryfiveyearsatwhichtimeitmaybereaffirmed,revised,orcancelled.SAEinvitesyourwrittencommentsandsuggestions.Copyright©2004SAEInternationalAllrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystemortransmitted,inanyformorbyanymeans,electronic,mechanical,photocopying,recording,orotherwise,withoutthepriorwrittenpermissionofSAE.TOPLACEADOCUMENTORDER:Tel:[phone](insideUSAandCanada)Tel:[phone](outsideUSA)Fax:[phone]Email:[e-mail]:®J1231REV.AUG20041.ScopeThisSAEstandardprovidesgeneralanddimensionalspecificationsforformedtubeendsandhosefittings.Theseconnectionsareintendedforgeneralapplicationsinlowpressureautomotiveandhydraulicsystemsonautomotive,industrial,andcommercialproducts.ThefittingsshowninFigures2and3areintendedtoberetainedbyhoseclampsasspecifiedinSAEJ1508.Itisrecommendedthatwherestepsizesoradditionaltypesoffittingsarerequired,theybedesignedtoconformwiththespecificationsofthisdocumentinsofarastheymayapply.Thefollowinggeneralspecificationsshallsupplementthedimensionaldatacontainedinthetableswithrespecttoallunspecifieddetail.2.References2.1ApplicablePublicationsThefollowingpublicationsformapartofthisspecificationtotheextentspecifiedherein.ThelatestissueofSAEpublicationsshallapply.2.1.1SAEPUBLICATIONSAvailablefromSAE,400CommonwealthDrive,Warrendale,PA150960001.SAEJ475—ScrewThreadsSAEJ476—DrysealPipeThreadsSAEJ512—AutomotiveTubeFittingsSAEJ514—HydraulicTubeFittingsSAEJ846—CodingSystemsforIdentificationofFluidConductorsandConnectorsSAEJ1508—HoseClampSpecifications2.1.2ASTMPUBLICATIONAvailablefromASTM,100BarrHarborDrive,WestConshohocken,PA19428.ASTMB117—MethodofSaltSpray(Fog)TestingSAEJ1231RevisedAUG2004-2-2.2RelatedPublicationsThefollowingpublicationsareprovidedforinformationpurposesonlyandarenotarequiredpartofthisdocument.2.2.1SAEPUBLICATIONSAvailablefromSAE,400CommonwealthDrive,Warrendale,PA15096-0001.SAEJ516—HydraulicHoseFittingsSAEJ1273—Selection,Installation,andMaintenanceofHoseandHoseAssemblies2.2.2ANSIPUBLICATIONAvailablefromANSI,11West42ndStreet,NewYork,NY10036-8002.ANSI/ASMEB1.20.1-1983—GeneralPurposePipeThreads3.SizeDesignationsThehosefittingsizeisgenerallydesignatedbythefractionalinchnominalhoseinsidediametertogetherwiththenominalpipeorstraightthreadsize.However,thesesizesmayalsobedesignatedbytheirdashsizesasfollows:3.1Thehosedashsizeisequivalenttothenumberofsixteenthinchincrementsinthehoseinsidediameter.3.2Thepipethreaddashsizeisthenumberofsixteenthinchincrementsinthenominalpipethreadsize.3.3TheOringbossthreaddashsizescorrespondtothenumberofsixteenthinchincrementsintheoutsidediameterofthetubingwithwhichtheyaredesignedtobeused.4.DimensionsandTolerancesTabulateddimensionsshallapplytothefinishedparts,platedorotherwiseprocessed,asspecifiedbythepurchaser.Detailsofinternalconstructionoffittingsarenotspecifiedandshallbeoptionalwiththemanufacturer.Whereapplicable,themaximumandminimumflatdimensionsshallbewithinthecommercialtoleranceofbarstockfromwhichthefittingsareproduced.Formedorupsetcontoursshallfitstandardwrenchopenings.Theminimumacrosscornersdimensionsofexternalhexagonsshallbe1.092timesthenominalwidthacrossflats,butshallnotresultinasideflatwidthoflessthan0.43timesthenominalwidthacrossflats.Exceptfornominalsizesandthreadspecifications,dimensionsandtolerancesaregiveninSIunits.Toleranceonalldimensionsnototherwiselimitedshallbe±0.25mm.Angulartoleranceonaxisofendsonelbowsshallbe±2.50degreesforsizesuptoandincluding9.52mmand±1.50degreesforsizeslargerthan9.52mm.SAEJ1231RevisedAUG2004-3-Unlessotherwisespecified,tolerancesonholediametersdesignatedasadrillinthedimensionaltables(Tables3,4,and5)shallconformtoTable1:TABLE1—TOLERANCESONDRILLEDHOLESDrillSizeRange,mmToleranceonHoleDiameter,mmPlusToleranceonHoleDiameter,mmMinus0.35-6.250.080.086.35-12.700.100.1013.10-19.050.130.1319.40-25.400.180.1325.80-38.100.200.1338.50andup0.250.135.PassagesWherepassagesinstraightfittingsaremachinedfromoppositeends,theoffsetatthemeetingpointshallnotexceed0.40mm.Thecrosssectionalareaatthejunctionoffluidpassagesshallnotbelessthanthatofthesmallestpassage.Thisassemblypassagedefinitiondoesnotapplytobenttubes.6.ContourDetailsofcontourshallbeoptionalwithmanufacturerprovidedthetabulateddimensionsaremaintainedandserviceabilityofthefittingsisnotimpaired.Wrenchflatsonelbowsshallbeoptional.7.StraightThreadsUnifiedStandardClass2AexternalandClass2Binternalthreadsshallapplytoplainfinish(unplated)fittingshavingstraightthreadsdesignatedA1inFigure3andTable5.Forexternallythreadedpartswithadditivefinish,themaximumdiametersofClass2Amaybeexce