Designation:F835−13StandardSpecificationforAlloySteelSocketButtonandFlatCountersunkHeadCapScrews1ThisstandardisissuedunderthefixeddesignationF835;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecificationcoverstherequirementsforquenchedandtemperedalloysteelhexagonsocketbutton(SBHCS)0.060through0.625threadsizesandflatcountersunk(SFHCS)0.060through1.5threadsizesheadcapscrewshavingmaterialpropertiesforhigh-strengthrequirements.1.2Fastenersmeetingthisspecificationareintendedforshear-typeapplicationsandhavetensilerequirementsrangingfrom122to150ksi.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thehazardstatementappliesonlytothetestmethodsection,Section11,ofthisspecification.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2A751TestMethods,Practices,andTerminologyforChemi-calAnalysisofSteelProductsD3951PracticeforCommercialPackagingE3GuideforPreparationofMetallographicSpecimensE18TestMethodsforRockwellHardnessofMetallicMa-terialsE112TestMethodsforDeterminingAverageGrainSizeE384TestMethodforKnoopandVickersHardnessofMaterialsF606TestMethodsforDeterminingtheMechanicalProper-tiesofExternallyandInternallyThreadedFasteners,Washers,DirectTensionIndicators,andRivetsF788/F788MSpecificationforSurfaceDiscontinuitiesofBolts,Screws,andStuds,InchandMetricSeries2.2ASMEStandards:3B18.3SocketCap,ShoulderandSetScrews—InchSeriesB18.24PartIdentifyingNumber(PIN)CodeSystemStan-dardforB18FastenerProducts3.Or...
