BS 1580-3-2007 Unified screw threads – Part 3 Screw threads with diameters below in – Requirements

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1、BS1580-3:2007BRITISHSTANDARDUnifiedscrewthreads–Part3:Screwthreadswithdiameters1belowin–Requirements---4ICS21.040.20LicensedCopy::FULLNAME,:DATE,UncontrolledCopy,(c)BSINOCOPYINGWITHOUTBSIPERMISSIONEXCEPTASPERMITTEDBYCOPYRIGHTLAWBS1580-3:2007Publishingandcopyrightinformatio

2、nTheBSIcopyrightnoticedisplayedinthisdocumentindicateswhenthedocumentwaslastissued.©BSI2007ISBN9780580579271ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferenceFME/9Draftforcomment07/30158492DCPublicationhistoryFirstpublishedAugust1965Secondedition,Dec

3、ember2007AmendmentsissuedsincepublicationAmd.no.DateTextaffectedLicensedCopy::FULLNAME,:DATE,UncontrolledCopy,(c)BSIBS1580-3:2007ContentsForewordiii1Scope12Normativereferences13Termsanddefinitionsandsymbols14Threadprofiles15Diameter/pitchcombinations26Toleranceclasses27Tol

4、erances,allowancesandlimitsofsizeforuncoatedthreads28Coatedthreads39Designationofthreads410Gauges4AnnexesAnnexA(normative)Unifiedscrewthreadsbelowindiameterfor1---4attachmentpurposesandforgeneraluseintheaircraftindustry16Bibliography17ListoftablesTable1–Unifiedscrewthreads

5、belowindiameter,1---4standardseries5Table2–Unifiedscrewthreadsbelow1---indiameter,standardseries–4Limitsofsize6Table3–Coarsethreadseries(UNC)belowindiameter–1---4Limitsandtolerancesforfinisheduncoatedthreads–ExternalthreadsClass2A8Table4–Coarsethreadseries(UNC)belowindiame

6、ter–1---www.bzfxw.com4Limitsandtolerancesforfinisheduncoatedthreads–InternalthreadsClass2B8Table5–Coarsethreadseries(UNC)belowindiameter–1---4Limitsandtolerancesforfinisheduncoatedthreads–ExternalthreadsClass3A9Table6–Coarsethreadseries(UNC)belowindiameter–Limitsand1---4to

7、lerancesforfinisheduncoatedthreads–InternalthreadsClass3B9Table7–Finethreadseries(UNF)belowindiameter–1---4Limitsandtolerancesforfinisheduncoatedthreads–ExternalthreadsClass2A10Table8–Finethreadseries(UNF)belowindiameter–1---4Limitsandtolerancesforfinisheduncoatedthreads–I

8、nternalthreadsClass2B10Table9–Finethreadseries(UNF)belowindiameter–1---4Limitsandtoleranc