Designation:A449−14StandardSpecificationforHexCapScrews,BoltsandStuds,Steel,HeatTreated,120/105/90ksiMinimumTensileStrength,GeneralUse1ThisstandardisissuedunderthefixeddesignationA449;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecification2coversquenchedandtemperedsteelhexcapscrews,bolts,andstudshavingaminimumtensilestrengthof120ksifordiameters1.0in.andsmaller;105ksifordiametersover1.0in.to11⁄2in.;and90ksifordiameters13⁄4in.to3.0in.inclusive.Theterm"fasteners"inthisspecificationdenoteshexcapscrews,bolts,andstuds.1.2Thefastenersareintendedforgeneralengineeringuse.1.3Thefastenersarefurnishedindiameters1⁄4to3.0in.inclusive.Theyaredesignatedbytypedenotingchemicalcompositionasfollows:TypeDescriptionTypeIPlaincarbonsteel,carbonboronsteel,alloysteel,oralloyboronsteelType2Withdrawn2003Type3Weatheringsteel1.4TermsusedinthisspecificationaredefinedinTermi-nologyF1789unlessotherwisedefinedinthisspecification.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3A563SpecificationforCarbonandAlloySteelNutsA751TestMethods,Practices,andTerminologyforChemi-calAnalysisofSteelProductsB695SpecificationforCoatingsofZincMechanicallyDe-positedonIronandSteelF436SpecificationforHardenedSteelWashersF606TestMethodsforDeterminingtheMechanicalProper-tiesofExternallyandInternallyThreadedFasteners,Washers,DirectTensionIndicators,andRivetsF788/F788MSpecification...
