Designation:F835M−11StandardSpecificationforAlloySteelSocketButtonandFlatCountersunkHeadCapScrews(Metric)1ThisstandardisissuedunderthefixeddesignationF835M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecificationcoverstherequirementsforquenchedandtemperedalloysteelhexagonsocketbutton(SBHCS)andflatcountersunk(SFHCS)headcapscrewsM3throughM20threadsizeshavingmaterialpropertiesofISO898/1PropertyClass12.9.1.2Fastenersmeetingthisspecificationareintendedforsheartypeapplicationsandhavetensilerequirementsequiva-lenttoISO898/1PropertyClass10.9.1.3Thehazardstatementpertainsonlytothetestmethodsection,Section11ofthisspecification.Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2A751TestMethods,Practices,andTerminologyforChemi-calAnalysisofSteelProductsE3GuideforPreparationofMetallographicSpecimensE112TestMethodsforDeterminingAverageGrainSizeE384TestMethodforKnoopandVickersHardnessofMaterialsF606MTestMethodsforDeterminingtheMechanicalProp-ertiesofExternallyandInternallyThreadedFasteners,Washers,andRivets(Metric)F788/F788MSpecificationforSurfaceDiscontinuitiesofBolts,Screws,andStuds,InchandMetricSeriesF1470PracticeforFastenerSamplingforSpecifiedMe-chanicalPropertiesandPerformanceInspectionF2328TestMethodforDeterminingDecarburizationandCarburizationinHardenedandTemperedThreadedSteelBolts,ScrewsandStuds2.2ANSI/ASMEStandards:B18.3.4MHexagonSocketButtonHeadCapScrews3B18.3.5MHexagonSocketFlatCountersunkHeadCapScrews3B18.24PartIdentifyingNumber(PIN)CodeSystemStan-d...
