【英文标准名称】:Mechanicalpropertiesoffasteners-Nutswithspecifiedproofloadvalues-Coarsethread
【原文标准名称】:紧固件机械性能.第2部分:有规定检验载荷值的螺母.粗牙螺纹
【标准号】:BSEN20898-2-1994
【标准状态】:作废
【国别】:英国
【发布日期】:1994-06-15
【实施或试行日期】:1994-06-15
【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】:螺钉连接;螺纹;螺距;紧固件;等级(质量);试验条件;化学成分;机械试验;低合金钢;直径;抗拉强度;名称与符号;钢;螺栓连接;非合金钢;作标记;硬度;弹性极限应力;内螺纹紧固件;螺纹紧固件;检验荷载;螺母
【英文主题词】:Chemicalcomposition;Designations;Fasteners;Marking;Mechanicalproperties;Normalthreads;Nuts;Properties;Steels;Strengthclass;Testforces;Testing
【摘要】:ThisInternationalStandardspecifiesthemechanicalpropertiesofnutswithspecifiedproofloadvalueswhentestedatroomtemperature(seeISO1).Prop-ertieswillvaryathigherandlowertemperature.Itappliestonuts—withnominalthreaddiametersuptoandinclud-ing39mm;—oftriangularISOthreadandwithdiametersandpitchesaccordingtoISO68andISO262(coarsethread);—withdiameter/pitchcombinationsaccordingtoISO261(coarsethread);—withthreadtolerances6HaccordingtoISO965-1andISO965-2;—withspecificmechanicalrequirements;—withwidthsacrossflatsasspecifiedinISO272orequivalent;—withnominalheightsgreaterthanorequalto0,5D;—madeofcarbonsteelorlowalloysteel.Itdoesnotapplytonutsrequiringspecialpropertiessuchas—lockingabilities(seeISO2320);—weldability;—corrosionresistance(seeISO3506);—abilitytowithstandtemperaturesabove+300℃orbelow-50℃.NOTES1Nutsmadefromfree-cuttingsteelshouldnotbeusedabove+250℃.2Forspecialproductssuchasnutsforhigh-strengthstructuralbolting,andovertappednutsforusewithhot-dippedgalvanizedbolts,seetheproductstandardsforappropriatevalues3Forassemblieswiththreadshavingtoleranceswiderthan6H/6g.thereisanincreasedriskofstripping;seealsotable1.4Inthecaseofthreadtolerancesotherorlargerthan6H,adecreaseofthestrippingstrengthshouldbecon-sidered(seetable1).note:*)DisthenominaldiameteroftheinternalthreadinaccordancewithISO724.
【中国标准分类号】:J13
【国际标准分类号】:21_060_20
【页数】:28P;A4
【正文语种】:英语