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1、FED-STD-H2831March1978SupersedingNBSHandbookH28PARTI(1969)PARTII(1957)PARTIII(1957)FEDERALSTANDARDSCREW-THREADSTANDARDSFORFEDERALSERVICESThisstandardwasapprovedbytheCommissioner,FederalSupplyService,GeneralServicesAdministration,fortheuseofallFederalagencies.U.S.GOVERNMENTPRINTI
2、NGOFFICE:1978-261-423/1075OrdersforthispublicationaretobeplacedwithGeneralServicesAdministration,actingasanagentfortheSuperintendentofDocuments.SinglecopiesofthisstandardareavailableattheGSABusinessServiceCentersinBoston,NewYork,Philadelphia,Atlanta,Chicago,KansasCity,MO,FortWor
3、th,Houston,Denver,SanFrancisco,LosAngeles,andSeattle,WA.orfromtheGeneralServicesAdministration,SpecificationandConsumerInformationDistributionBranch,Bldg.197,WashingtonNavyYard,Washington,DC20407.Price2.50centseach.FSCTHDSFED-STD-H2831March1978INFORMATIONSHEETONFEDERALSTANDARDST
4、hisFederalStandardisissuedinlooseleafformtopermittheinsertionorremovalofneworrevisedpagesandsections.AllUsersofFederalStandardsshouldkeepthemuptodatebyinsertingrevisedornewpagesasissuedandremovingsupersededandcancelledpages.NewandrevisedpageswillbeissuedunderChangeNoticeswhichwi
5、llbenumberedconsecutivelyandwillbearthedateofissuance.ChangeNoticesshouldberetainedandfiledinfrontoftheStandarduntilsuchtimeastheyaresupersededbyareissueoftheentireStandard.NOTICEFrom1939,theInterdepartmentalScrew-ThreadCommittee(ISTC),undertheChairmanshipoftheNationalBureauofSt
6、andards(NBS),DepartmentofCommercehaddevelopedandpublishedNBSHandbookH28,Screw-ThreadStandardsforFederalServices.Section487ofTitle40oftheU.S.CodestatesthattheauthorityfordevelopmentofFederalStandardsforprocurementpurposesrestswiththeGeneralServicesAdministration(GSA).InNovember19
7、76,theISTCwasterminated,andtheGeneralServicesAdministration(GSA)acceptedtheresponsibilityforNBSHandbookH28andagreedtoconvertitandmaintainitasaFederalStandard.ThestandardswhichhadbeenpublishedasNBSHandbookH28,Part1,PartIIandPartIIIwillnowbepromulgatedasafullycoordinatedFED-STD-H2
8、8,maintainingtheexistingsectionsandidentifyingt
