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【英文标准名称】:Fasteners-Surfacediscontinuities-Bolts,screwsandstudsforgeneralrequirements
【原文标准名称】:紧固件的表面不均匀性.第1部分:一般要求的螺栓、螺钉和螺柱
【标准号】:BSEN26157-1-1992
【标准状态】:现行
【国别】:英国
【发布日期】:1992-05-01
【实施或试行日期】:1992-05-01
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:螺钉;抽样方法;机械零部件;紧固件;表面缺陷;尺寸;螺栓;性能;验收(鉴定);检验;六角头紧固件;圆形;螺柱
【英文主题词】:Bolts;Defects;Definitions;Fasteners;Fits;Flaws;Screws(bolts);Specification(approval);Studs;Studs(fasteners);Surfacedefects;Surfacediscontinuities;Surfaces;Threads
【摘要】:1ThispartofISO6157establisheslimitsforvarioustypesofsurfacediscontinuitiesonbolts,screwsandstudsforgeneralrequirements.Itappliestobolts,screwsandstudswith—nominalthreaddiameters5mmandlarger;—productgradesAandB;—propertyclassesuptoandincluding10.9,unlessother-wisespecifiedinproductstandardsoragreedbetweensupplierandpurchaser.2Limitsforsurfacediscontinuitiesonbolts,screwsandstudsforspecialrequirements(e.g.automaticassembly)arelaiddowninISO6157-3.Whentheengineeringrequirementsoftheapplicationnecessitatethatsurfacediscontinuitiesonbolts,screwsandstudsbemorecloselycontrolled,itshouldbespecifiedintherespectiveproductstandard,orthepurchasershallspecifytheapplicablelimitsintheinquiryandpurchaseorder.3Wherethepermissiblelimitsforsurfacediscontinuitiesindicatedinclause3occur,theminimumvaluesforthemechanicalandfunctionalpropertiesspecifiedinISO898-1shouldstillbemet.NOTES1Thefiguresinclause3areexamplesonly.Theyapplycorrespond-inglyalsotoothertypesofbolts,screwsandstuds.2Theindividualfiguresshowthesurfacediscontinuitiesexaggeratedinsomecasesforclarity.
【中国标准分类号】:J13
【国际标准分类号】:21_060_10
【页数】:20P.;A4
【正文语种】:英语