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Designation:F2329–05StandardSpecificationforZincCoating,Hot-Dip,RequirementsforApplicationtoCarbonandAlloySteelBolts,Screws,Washers,Nuts,andSpecialThreadedFasteners1ThisstandardisissuedunderthefixeddesignationF2329;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoverstherequirementsforhot-dipzinccoatingappliedtocarbonsteelandalloysteelbolts,screws,washers,nuts,andspecialthreadedfastenersappliedbythehot-dipcoatingprocess.Nailsandrivetsarenotincludedinthisspecification.1.2Itisintendedtobeapplicabletofastenersthatarecentrifugedorotherwisehandledtoremoveexcessgalvanizingbathmetal(freezinc).1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2A153/A153MSpecificationforZincCoating(Hot-Dip)onIronandSteelHardwareA563SpecificationforCarbonandAlloySteelNutsB487TestMethodforMeasurementofMetalandOxideCoatingThicknessbyMicroscopicalExaminationofaCrossSection.E376PracticeforMeasuringCoatingThicknessbyMagnetic-FieldorEddy-Current(Electromagnetic)Exami-nationMethodsF606TestMethodsforDeterminingtheMechanicalProp-ertiesofExternallyandInternallyThreadedFasteners,Washers,andRivetsF1470GuideforFastenerSamplingforSpecifiedMechani-calPropertiesandPerformanceInspectionF1789TerminologyforF16MechanicalFasteners3.Terminology3.1TermsusedinthisspecificationaredefinedinTermi-nologyF1789unlessotherwisedefinedinthisspecification.3.1.1batchlot—quantityofidenticalpartscleaned,pickled,fluxed,andgalvanizedtogetheratonetimeinagalvanizingbasket.3.1.2galvanizing—hot-dipzinccoating.3.1.3hightemperaturegalvanizing—galvanizingprocesscarriedoutinaceramicvessel(kettle)atanapproximatetemperaturerangingbetween990and1040°F.3.1.4hot-dipzinccoatingofmechanicalfasteners—processwherebyfastenersarezinccoatedbyimmersioninabathofmoltenzinc,resultingintheformationoftheiron/zincalloycoatingandazinccoatingatthesurfaceofthefastener.Thisprocessinvolvestheremovalofexcesszincbyspinningthepartsinacentrifuge,orbrushingthethreadedportion,orhandlingotherwisetoremovetheexcesszinc.3.1.5productionlot—batchesofpartsoriginatingfromthesamemanufacturinglot,processedcontinuouslythroughclean-ing,pickling,fluxing,dippinginmoltenzincandspuninacentrifuge,orothermeans,withoutanysignificantchangeintime,temperature,andconcentrationoftheconstituentsoftheprocess.3.1.6stressrelief—processofheatingpartsforadefinitetimeatagiventemperatureinordertorelievestressinducedbyworkhardening.4.OrderingInformation4.1Ordersforzinccoatingoffastenerstothisspecificationshallincludethefollowing:4.1.1Nameofproduct(thatisbolt,stud,nut,washers,orother);4.1.2ASTMdesignationandyearofissue,includingfas-tenerspecificationnumber;4.1.3Hydrogenembrittlementrelief,asrequiredbythepurchaser,see7.2.3;4.1.4Quantityoffastenerstobehot-dipzinccoated;4.1.5Stressreliefortemperingtemperaturetowhichthefastenersweresubjected,ifapplicable;1ThisspecificationisunderthejurisdictionofASTMCommitteeF16onFastenerandisthedirectresponsibilityofSubcommitteeF16.03onCoatingsonFasteners.CurrenteditionapprovedFeb.1,2005.PublishedFebruary2005.2ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.4.1.6Secondaryprocessingsuchaschromating,phosphat-ing,orlubrication,ifapplicable;4.1.7Averagegalvanizingtemperaturetowhichfastenerswillbesubjected,ifrequiredbythepurchaser(see7.2.2);4.1.8Specifybakingifrequired(see7.2.3);and4.1.9Certification,ifrequired(see14.1).5.MaterialsandManufacture5.1ConditionoftheAs-ReceivedFasteners—Thefastenersasreceivedbythegalvanizershallbefreefromcontaminantsthatarenotreadilyremovedinthecleaningprocessandwouldadverselyaffectthegalvanizing.5.2Process—Unlessotherwisecoveredinthisspecifica-tion,allprocessingparametersshallbeinaccordancewiththerequirementsofSpecificationA153/A153M.5.2.1ProcessControl—GalvanizedfastenerssubjectedtoaprocesscontrolplanbaseduponbatchlotlevelshallcomplywiththebatchlotsamplingplaninTable1,andthesamplingplanforproductionlot(preventionprocess)asdeterminedin10.2.2shallbeapplied.5.3SpinningandQuenching:5.3.1Partsshallbespunimmediatelyfollowingremovalfromthegalvanizingbathandquenchedinwater.Inaddition,smallpartsshallbeaircooledasneededinordertopreventtheformationofzincoxide.5.3.2Parts,whichcannotbespunshallbebrushedorhandledotherwisetoremovetheexcesszinc.5.4AlterationofThreadedFasteners:5.4.1Fastenersthathavebeenhot-dipgalvanizedshallnotbefurtheraltered(suchassubjectedtoacutting,rolling,finishing-tooloperation)bythegalva