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1、INTERNATIONA1.STANDARDISO3408-2editionSeCOnd202105Ba1.1.screws一加a1.diameters,1.eads,nutdimensionsandmountingbo1.ts一MetricseriesVisdbi1.1.esPartie2:Diamitresctpash61.icoidauxnominauxetdimensionsdesecrousetbou1.onsdemontageSeriemetriqueReferencenumberISO340822021(E)COPYRIGHTPROTECTEDDOCUMENTISO2021岫rk
2、dea/山thUcdOthcnviscjftc三orrtmcehDVBiwixuioiti08phnn11UatiocBhrhotocp)Mng,ptbcatonpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanherequestedfromeitherISOattheaddressbe1.owOr1.sOXSmemberbodyinthecountryoftherequester.%,tft晒Iandonnet8CH-1214*crnicr,GenevaPhone：M1.22749O1.11
3、帆禅igjWft.orgPub1.ishedinSwitzerhndUnitsdiametermmF1.angemountingbo1.tdiametermmScrewheadcounterborePart7mmdiameterrd1.1.z,mmCentringdiameter1.engthThisdocumentspecifiesthenomina1.diametersandnomina1.1.eads,mountingdimensionsforba1.1.1ISO2021-A1.1.rightsreservedscrewnutsnomina1.1.eadandametricba1.1.w
4、hichIta1.sothepreferredofbeusedwhenitbecomesnecessarytodeviatefromtheprefenedcombinations.Thefo1.1.owingdomentsarereferredtointhetextinsuchawaythatsomeora1.1.oftheircontentundatedreferences,theofthisoftheFordateddocumenton1.ytheanyeditioncitedForISO3408-1,Ba1.1.screwsPart1:Vocabu1.aryanddesignationF
5、orthepurposesofthisdocument,thete11nsanddefinitionsgiveninISO3408-1app1.y.ISOOn1.inebrowsingp1.atform:avai1.ab1.eathttps:/www.iso.org/obp4 IECSymboIsNomina1.diametermmDiMountingbo1.tpitchcirc1.ediametermmDsF1.angeouterdiametermmDiAxia1.1.oadattheopening1.imitofthenutf1.angekN1.i1.j1.BF1.ange1.engthm
6、mF1.atf1.angewidthmm1.io1.ubricationportthread1.engthmm伊，Nomina1.1.eadmmThreadfor1.ubricationportTaTighteningtorqueofonebo1.tNm5 Nomina1.diameters,nomina1.1.eadsandtheircombinationsNomina1.diameters,nomina1.1.eadsandtheircombinationsareshowninTab1.e1.Preferredcombinationofnomina1.diameterand1.eadare
7、high1.ightedingreyandbo1.d.-SO34082:2021NCmirU1.1.diuI1.1.1.1.1.NPminaI帆dPbmmIue1.U1.juIiiiiiji1.522.5345681012IS16202530324050415I1.52611.522.5510811.522.5345681012101.522.5345681012201222.5345681012151620253014223345681012IS16202530162.S34S681012IS1620253040203456810121516202530324050254S681012151
8、6202530324050284S681012151620253032405032456810121516202530324050364S681012IS162025303240504056810121516202530324050455681012IS16202530324050505681012IS1620253032405063681012IS162025303240508068101215162025303240501001012151620253032405012512IS16202530324050Tab1.e1-Nomina)diameters,nomina1.1.eadsand
9、theircombinations50323052612021A=-whrsreservedNomiiui!diameterNumina1.1.endBa1.1.screwnuouterdiameterMoun(hbo1.1.PitCi1.CirdCdiameterBa1.1.screwnutf1.angetypeFUngemountingIw1.Udiam-cterF1.angeoucediane(erScrewheadcounterborei.11-IerCentringebo1.edoPoDiDiDS取Di1.i1.51.1.UQFaibHbmmmmmnummmmmmmmmmmmminm
10、mmmkNNmmin.max.stt.36565268986M1015338,5M6iM859.52636856729901410IS3SMG1.MS952636105878I1.1(X17.510183811M6IM1.O98,45140iS6S6729901410IS3485Rc1./8MBS9.S2640860769941410IS36BSRc1./8M8S9.S26401062821110417.510-184011Rc1./8M1.O98r4514DiI2S16749Z1111417.5ZU一IH4311Kc1./HM1.OH.451452566178Figure4.5996141015378,5Rc1./8M859,42645B6S82TyPC6.C691001410-IS3B”Rc1./8MBS9,4264S106788I1.11017.510184311Rc1./8M1.O98.351505666829100!1.1015388,5Rc1./8M
