【英文标准名称】:ISOgeneralpurposemetricscrewthreads-Tolerances-Limitsofsizesforhot-dipgalvanizedexternalscrewthreadstomatewithinternalscrewthreadstappedwithtolerancepositionHorGaftergalvanizing
【原文标准名称】:ISO普通米制螺纹.公差.第4部分:与镀锌后公差带位置为H或G攻出的内螺纹相匹配的热浸镀锌外螺纹的尺寸极限
【标准号】:BSISO965-4-1999
【标准状态】:现行
【国别】:英国
【发布日期】:1999-04-15
【实施或试行日期】:1999-04-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:螺纹;螺距;螺纹紧固件;ISO米制螺纹;外螺纹;热浸镀锌;半径;长度;螺纹形状;尺寸;尺寸;直径;标准差;金属覆层;尺寸公差
【英文主题词】:Corediameter;Dimensions;Externalthreads;Hot-galvanized;ISOmetricthreads;ISOscrewthreads;Limitdimensions;Outsidediameters;Pitchdiameter;Threads;Tolerances(measurement)
【摘要】:ThispartofISO965specifiesdeviationsandlimitsofsizesforpitchandcrestdiametersforISOgeneralpurposemetricexternalscrewthreadsconformingtoISO262havingabasicprofileaccordingtoISO68-1.ExternalscrewthreadsaccordingtothispartofISO965areintendedtomatewithinternalscrewthreadstappedwithtolerancepositionHorGafterhotdipgalvanizing.ThelimitsofsizesforthetolerancequalityspecifiedarederivedfromtolerancesspecifiedinISO965-1andthefundamentaldeviationsaccordingtothefollowingformula:esaz=-(300+20P)whereesisexpressedinmicrometres;Pisexpressedinmillimetres.ProductsmadewiththreadtolerancesinaccordancewiththispartofISO965mayshowfailureatlowerultimatetensileloadsthanthosespecifiedinISO898-1duetoreductionofthestressarea.ExternalscrewthreadswiththreadtolerancesaccordingtothispartofISO965mustnotbematedwithinternalscrewthreadswiththreadtolerancesaccordingtoISO965-5becausesuchcombinationswillcreatesevereriskforthreadstripping.NOTEIfthetoleranceclass6azisnotspecifiedtheexternalscrewthreadsaretomatewithinternalscrewthreadswithtoleranceposition6AZiftheproductsarecentrifugedandwithhot-dipgalvanizedinternalscrewthreadswithtoleranceposition6AXiftheproductsarenotcentrifuged.
【中国标准分类号】:J13
【国际标准分类号】:21_040_10
【页数】:10P;A4
【正文语种】:英语