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1、AerospaceNATIONALAEROSPACESTANDARDIndustries0COPYRIGHT2MnAEROSPACEINDUSTRIESASSOCIATIONOFAMERICA,INC.ALLRIGHTSRESERVEDAssociationFEDSUPCLASS5340GENERALINSTRUCTIONS1.DESCRIPTION:Helicalcoilinsertsarescrewthreadbushingscoiledfromdiamondshapedcross-sectionwire.Theyarescrewedintotappedh
2、olestoformnominalsizeinternalthreads.Insertsareinstalledbytorquingthroughadiametraltangwhichisnotchedfortangremoval.2.MATERIAL:Asspecifiedonthedrawing.--``-`-`,,`,,`,`,,`---3.THREADS:Assembledinserts,Classes28and38,arecontrolledbythetolerancerangeofthetappedholeintowhichinsertisfitt
3、ed.Duetotheradiusonthecrestoftheinsertattheminordiameter,theassembledinsertwillacceptexternalthreadedpartswhicharethreadedtoMIL-S-8879.Thegripcoilorcoilsofthescrewlockinginsertareshapedtoprovideaprevailingtorquewhenthescrewisinstalledintheassembledinsert.4.TAPPEDHOLE:60"UnifiedInter
4、nalthreadformwiththeminimummajordiameterbasedonatruncationto0.125~.4.Desiqnationfortappedhole:Thedrawingnoteforthetappedhole,pertableIV,thatwillacceptthehelicalcoilinsertshallbeinaccordancewiththefollowingexamples:EXAMPLE1.3125-24UNF-3BHELICALCOIL.3125-24UNF-38HELICALCOILINSERTTHDPE
5、RMS33537INSERTTHDTHRUPERMS33537.67MINFULLTHDDEPTHINSTALLINSEET.75-1.5TURNSBELOWSURFACEREMOVETANGForBlindHole(Basedon2DiameterForthruholewithInsertbeingEngagement)(MinorDiameterDrillAssembled(Basedon2DiameterDepthToleranceapprox..O60orEngagement)asotherwiseappropriate)LISTOFCURRENTSH
6、EETSTHEINITIALRELEASEOFTHISDOCUMENTSUPERSEDESMS33537.REVISIONE.AMENDMENT1.PARTNUMBERSREMAINMS33537THIRDCUSTODIANNATIONALAEROSPACESTANDARDSCOMMITTEEIANGLEPROJECTION-@.-a-PROCUREMENTTITLECLASSIFICATIONSPECIFICATIONINSERT,SCREWTHREAD,HELICALCOIL,PARTSTANDARDINCHSERIES,COARSEANDFINETHRE
7、AD,NONESTANDARDASSEMBLYDIMENSIONSFORSHEET1OF13USEOFORRELIANCEUPONTHISDOCUMENTORANYNATIONALAEROSPACESTANDARDISENT.RELYVOLUNTARYAIADOESNOTOUALINSUPPLIERSORCERTIFïCONFORMANCEOFITEMSPROCLREDUhDERhATIONALAEROSPACESTANDARCSAIAMAGSNOREPRESENTATIONORCLAIMRESPECTING____i1iTHES~ITABILITYOFITE
8、MSFORANYPARTICULARA
