Designation:A574M−12StandardSpecificationforAlloySteelSocket-HeadCapScrews(Metric)1ThisstandardisissuedunderthefixeddesignationA574M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecificationcoverstherequirementsforquenchedandtemperedalloysteelhexagonsocket-headcapscrews,1.6mmthrough48mmindiameterhavingaminimumultimatetensilestrengthof1220MPa.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.NOTE1—ThisspecificationisthemetriccompanionofSpecificationA574.1.3Thefollowinghazardcaveatpertainsonlytothetestmethodportions,sections5.1,5.6,8,and12,ofthisspecifi-cation.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2A751TestMethods,Practices,andTerminologyforChemi-calAnalysisofSteelProductsE112TestMethodsforDeterminingAverageGrainSizeF606MTestMethodsforDeterminingtheMechanicalProp-ertiesofExternallyandInternallyThreadedFasteners,Washers,andRivets(Metric)F788/F788MSpecificationforSurfaceDiscontinuitiesofBolts,Screws,andStuds,InchandMetricSeriesF1470PracticeforFastenerSamplingforSpecifiedMe-chanicalPropertiesandPerformanceInspectionF1789TerminologyforF16MechanicalFastenersF1940TestMethodforProcessControlVerificationtoPreventHydrogenEmbrittlementinPlatedorCoatedFastenersF2282SpecificationforQualityAssuranceRequirementsforCarbonandAlloySteelWire,Rods,andBarsforMe-chanicalFastenersF2328MTestMethodforDeterminingDecarburizationandCarburizationinHardenedandTemperedThreadedSteelBolts,ScrewsandStuds(Metric)2....
