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1、BS3643-2:2007BRITISHSTANDARDISOmetricscrewthreadsPart2:SpecificationforselectedlimitsofsizeICS21.040.10NOCOPYINGWITHOUTBSIPERMISSIONEXCEPTASPERMITTEDBYCOPYRIGHTLAWBS3643-2:2007PublishingandcopyrightinformationTheBSIcopyrightnoticedisplayedinthisdocumentindicateswhenthe
2、documentwaslastissued.©BSI2007ISBN9780580579257ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferenceFME/9Draftforcomment07/30158488DCPublicationhistoryFirstpublishedJune1965Secondedition,December1966Thidedition,December1981Fourthedition,November2007
3、AmendmentsissuedsincepublicationAmd.no.DateTextaffectedBS3643-2:2007ContentsForewordii1Scope12Normativereferences13Termsanddefinitions14Designation25Requirements2AnnexesAnnexA(normative)Fundamentaldeviations,tolerancesandlimitsofsizeforadditionaltoleranceclassesforaero
4、spaceuse39Bibliography42ListoftablesTable1–ISOmetricscrewthreads–Limitsandtolerancesforfinisheduncoatedthreadsfornormallengthofengagement3TableA.1–ISOmetricscrewthreads–Limitsandtolerancesforfinisheduncoatedthreadsfornormallengthofengagementforaerospaceuse40www.bzfxw.c
5、omSummaryofpagesThisdocumentcomprisesafrontcover,aninsidefrontcover,pagesiandii,pages1to42,aninsidebackcoverandabackcover.©BSI2007•iBS3643-2:2007ForewordPublishinginformationThispartofBS3643ispublishedbyBSIandcameintoeffecton30November2007.ItwaspreparedbySubcommitteeSF
6、TSE/1,Screwsandfastenerstechnicalspecificationcommittee,undertheauthorityofTechnicalCommitteeFME/9,Nuts,boltsandaccessories.Alistoforganizationsrepresentedonthiscommitteecanbeobtainedonrequesttoitssecretary.SupersessionThispartofBS3643supersedesBS3643-2:1981,whichiswit
7、hdrawn.RelationshipwithotherpublicationsBS3643consistsofthefollowingparts:•Part1:Principlesandbasicdata;•Part2:Specificationforselectedlimitsofsize.InformationaboutthisdocumentThispartofBS3643hasbeenrevisedtobringituptodate.HazardwarningsWARNING.Attentionisdrawntothefa
8、ctthat,withthedifferentscrewthreadformsavailable,thereisthepossibilityofamismatch,whichispotentiallyhazardous.Itisthe
