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1、紧固件标准件介绍（Fastenerstandardpartsintroduction）Standardparts-IntroductionThefasteneronthemarket,alsoknownasstandardparts.Isakindofmechanicalpartsforfasteningconnection,theapplicationisveryextensive.Thecharacteristicsoffasteners:differentspecifications,performanceofdifferentuses,andstanda
2、rdizationanduniversalizationofthehighdegreeof.Therefore,therearepeoplewhohavebeenthecountry(industry)atypeoffasteningstandardpartscalledstandardfasteners,referredtoasstandardparts.Thespecifications,dimensions,tolerances,weight,performance,surface,markingeachspecificmethodoffastenerpr
3、oducts,specificrequirementsandacceptanceinspection,markingandpackagingitems,arerespectivelyspecifiedinseveralcountries(industry)standards,suchastheBritish,Germanandamerican.Fastenersarethemostwidelyusedbasicpiecesofmachinery.WithChina'sentryintoWTOin2001andenteredtheranksofinternatio
4、naltrade.China'sfastenerproductsexportedtothefastenerproductsallovertheworld,theworldoftheinfluxofChinamarket.FastenersasChina'simportandexportofalargeamountofproductswithinternationalstandards,topromoteChinesefastenerenterprisestotheworld,topromotethefastenerenterprisestofullypartic
5、ipateininternationalcooperationandcompetition,allwithsignificanceandimportantstrategicsignificance.Thefastenerispartwillbetwoormorethantwo(ormember)istightlyconnectedtobecomeageneraltermforaclassofmechanicalpartsusedatthesightofthewhole.Themarketisalsoknownasstandardparts.Standardcla
6、ssification1.:theheadandbolt(screwcylinderwithexternalthread)iscomposedoftwopartsofaclassoffasteners,andanutisusedforfastening,connectingtwopartswithhole.Thiskindofconnectionformcalledboltconnection.Ifthenutisscrewedofffromthebolt,itcanmakethetwoseparateparts,theboltconnectionisdetac
7、hablyconnectedto.2.stud:nohead,aclassoffastenersonlyatbothendswithouterthread.Oneendoftheconnection,itmustbescrewedwithinternalthreadholesintheparts,theotherendpassesthroughthethroughholesintheparts,thenscrewonthenut,evenifthetwopartsareconnectedintoawholefastening.Thiskindofconnecti
8、onformknowna
