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1、www.swagelok.comThreadandEndConnectionIdentificationGuideContentsIntroductionINTRODUCTIONThreadandEndConnectionTerminology....4GeneralTerminology..................5Step-by-StepIdentificationProcedureforThreadsandEndConnections..............6IDENTIFICATI
2、ONThreadIdentificationReferenceTables..................12TaperedThreads..................20EndConnectionsThatUse:TaperedThreads.....................22TABLESStraightThreads..................26EndConnectionsThatUse:UnifiedScrewThreads.................28IS
3、O228/1Threads...................35Metric(ISO261)Threads..............42NPSMThreads......................49TAPEREDAppendixEndConnectiontoThreadMatrix........50ThreadtoEndConnectionMatrix........51ThreadIdentificationTools.............52Glossary..........
4、.................53STRAIGHTAPPENDIX3IntroductionThreadandEndConnectionTerminologyStandardsareusedtohelpidentifythreadsandendINTRODUCTIONconnections.Wewillusethefollowingdefinitionsinthismanual:ThreadStandardAspecificreferencetoaformalstandard(forexample
5、,ANSI/ASMEB1.1,DIN2999,orISO261)whichdescribesthreadform,includingathread’sangle,pitch,anddiameter.EndConnectionStandardAspecificreferencetoanationalstandard(suchasDIN3852orJISPT)orindustry-groupstandard(suchasSAEJ512)whichdescribesanendconnection’scomp
6、onents,sealarea,geometry,andnominalsizes.Threadstandardsareusuallyreferencedintheendconnectionstandard.ThreadStandardsandEndConnectionStandardsManymechanicalendconnectionshavethreads.Therefore,threadstandardscanbeusedtohelpdefineendconnectionstandards.P
7、itchForthepurposesofthisguide,pitchreferstothreadsperinch,insteadofthedistancebetweenthethreads,forfractionalscrewthreadsandpipethreads.Forallmetricscrewthreads,pitchreferstothedistancebetweenadjacentthreads.4GeneralTerminologyGeneraltermsandcharacteris
8、tics,whichapplytoallendconnectionthreads,areshownbelowforbothINTRODUCTIONmaleandfemalethreads.Threads1.Crest5.ThreadFlankAngle2.Root6.TaperAngle3.Flank7.MaleThreadOD4.Pitch(Metric)8.FemaleThreadID46781235MaleFemale1EndConnections
