ISO 4759-3-2000 紧固件公差第3部分:螺栓、螺钉和螺母用平垫圈产品等级为A和C级
作者:标准资料网 时间:2024-05-14 15:45:40 浏览:8610
来源:标准资料网
【英文标准名称】:Tolerancesforfasteners-Part3:Plainwashersforbolts,screwsandnuts-ProductgradesAandC
【原文标准名称】:紧固件公差第3部分:螺栓、螺钉和螺母用平垫圈产品等级为A和C级
【标准号】:ISO4759-3-2000
【标准状态】:现行
【国别】:国际
【发布日期】:2000-05
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC2
【标准类型】:()
【标准水平】:()
【中文主题词】:产品等级;尺寸公差;垫圈;紧固件;公差(测量);尺寸
【英文主题词】:Dimensionaltolerances;Dimensions;Fasteners;Nuts;Productgrades;Shallow;Tolerances(measurement);Washers
【摘要】:ThispartofISO4759establishesaselectionoftolerancesforuseinthepreparationofISOproductstandardsforpunchedplainwashersofproductgradesAandC,forusewithbolts,screwsandnutsofnominalthreaddiametersoffrom1mmto150mminclusive.Itisrecommendedthatthesetolerancesalsobeusedfornon-standardwashers.NOTETheproductgradereferstothequalityoftheproductandtothesizeofthetolerances.AnnexA(informative)presentstolerancestakenfromISO286-1andISO286-2.
【中国标准分类号】:J13
【国际标准分类号】:21_060_30
【页数】:6P.;A4
【正文语种】:英语
【英文标准名称】:Copper-manganesealloywires,barsandsheetsforelectricalresistance
【原文标准名称】:铜锰电阻丝、棒及板
【标准号】:JISC2522-1986
【标准状态】:作废
【国别】:日本
【发布日期】:1986-07-01
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JISC)
【起草单位】:TechnicalCommitteeonNon-FerrousMetals
【标准类型】:()
【标准水平】:()
【中文主题词】:线绕电阻器;电阻器;含镍合金;丝带;锰镍铜合金;含锰合金;含铜合金;金属线;合金;薄板材;电阻;电线
【英文主题词】:electricalresistance;wires;ribbon;;;manganin;manganese-containingalloys;nickel-containingalloys;;sheetmaterials
【摘要】:
【中国标准分类号】:K14
【国际标准分类号】:29_060_10
【页数】:12P;A4
【正文语种】:日语
【英文标准名称】:StandardTestMethodforStiffnessofFabrics
【原文标准名称】:织物硬挺性标准试验方法
【标准号】:ASTMD1388-2007a
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D13.60
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:弯曲长度;硬挺度;测试;试验;机织物
【英文主题词】:bendinglength,fabric;fabric;flexuralrigidity,stiffness;Stiffness--textilematerials/applications;Textilefabrics(general);
【摘要】:Bothtestoptionsinthistestmethodareconsideredsatisfactoryforacceptancetestingofcommercialshipmentssincecurrentestimatesofbetween-laboratoryprecisionareacceptableandthemethodisusedextensivelyinthetradeforacceptancetesting.Incaseofadisputearisingfromdifferencesinreportedtestresultswhenusingthistestmethodforacceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldconductcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimensthatareashomogeneousaspossibleandthatarefromalotofmaterialofthetypeinquestion.Testspecimensshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.Theaverageresultsfromthetwolaboratoriesshouldbecomparedusingtheappropriatestatisticalanalysisandanacceptableprobabilitylevelchosenbythetwopartiesbeforetestingisbegun.Ifabiasisfound,eitheritscausemustbefoundandcorrectedorthepurchaserandthesuppliermustagreetointerpretfuturetestresultswithconsiderationtotheknownbias.Ingeneral,theseproceduresaremoresuitablefortestingwovenfabricsthanknitfabrics.TheCantileverTestOptionisthepreferredprocedurebecauseitissimplertoperform.Itis,however,notsuitableforverylimpfabricsorthosethatshowamarkedtendencytocurlortwistatacutedge.TheHeartLoopTestOptionissuitableforfabricsthatshowatendencytocurlortwist.Bothoptionscanprovideacorrelationwithasubjectiveevaluationofagivenfabrictype.Thatis,ahighernumberrepresentsastifferfabric.Thestiffnessofafabricmaychangewithstorage.Noevidencehasbeenfoundshowingthatbendinglengthisdependentonthewidth.Thetendencyforspecimenstocurlortwistwillaffecttheresult,becauseoftherigidityprovidedattheedge.Consequently,thewiderthestrip,thelessimportantistheedgeeffect.1.1Thistestmethodcoversthemeasurementofstiffnesspropertiesoffabrics.Bendinglengthismeasuredandflexuralrigidityiscalculated.Twoproceduresareprovided.1.1.1OptionA8212;CantileverTest,employingtheprincipleofcantileverbendingofthefabricunderitsownmass.1.1.2OptionB8212;HeartLoopTest,employingtheprincipleofaloopformedinafabricstripandhungvertically.1.2Thistestmethodappliestomostfabricsincludingwovenfabrics,airbagfabrics,blankets,nappedfabrics,knittedfabrics,layeredfabrics,pilefabrics.Thefabricsmaybeuntreated,heavilysized,coated,resin-treated,orotherwisetreated.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.TheU.S.customaryunitsmaybeapproximate.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W04
【国际标准分类号】:59_080_30;
【页数】:6P.;A4
【正文语种】:
