Designation:F912−11StandardSpecificationforAlloySteelSocketSetScrews1ThisstandardisissuedunderthefixeddesignationF912;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecificationcoverstherequirementsforquenchedandtemperedalloysteelsocket-setscrews(SSS)innominaldiameters0.060through2in.havinghardnesses45to53HRC.1.2Thesesetscrewsareintendedforcompressionapplica-tionsonlyandarenotcustomarilysubjectedtoembrittlementtests.Fortensileapplications,consultwiththemanufacturerforproperalloyandhardness.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.NOTE1—AcompletemetriccompaniontoSpecificationF912hasbeendeveloped—F912M;therefore,nometricequivalentsareshowninthisSpecification.1.4Thehazardstatementpertainsonlytothetestmethodsection,Section11ofthisspecification.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2A751TestMethods,Practices,andTerminologyforChemi-calAnalysisofSteelProductsE3GuideforPreparationofMetallographicSpecimensE112TestMethodsforDeterminingAverageGrainSizeE384TestMethodforKnoopandVickersHardnessofMaterialsF606TestMethodsforDeterminingtheMechanicalProper-tiesofExternallyandInternallyThreadedFasteners,Washers,DirectTensionIndicators,andRivetsF788/F788MSpecificationforSurfaceDiscontinuitiesofBolts,Screws,andStuds,InchandMetricSeriesF1470PracticeforFastenerSamplingforSpecifiedMe-chanicalPropertiesandPerformanceInspectionF2328TestMethodforDeterminingDecarburizationandCarburizationinHar...
