Designation:D3657−03(Reapproved2021)StandardSpecificationforZipperDimensions1ThisstandardisissuedunderthefixeddesignationD3657;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationestablishesstandarddimensionsforzippersofallmaterialsforspecifiedsizedesignation;forequivalency,ininch-poundandmetricunits,ofzipperlengthandlengthtolerances,oftapewidthandwidthtolerances,andoftapeendlengths.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemarenotnecessarilyexactequivalents;therefore,toensureconformancewiththestandard,eachsystemshallbeusedindependentlyoftheother,andvaluesfromthetwosystemsshallnotbecombined.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD2050TerminologyRelatingtoSubassembliesUsedintheManufactureofTextilesD2060TestMethodsforMeasuringZipperDimensions3.Terminology3.1Definitions:3.1.1Fordefinitionsofzippertermsusedinthisstandard,refertoTerminologyD2050.FordefinitionsofothertextileterminologyusedinthisstandardrefertoTerminologyD123.4.Sampling4.1SamplethelotandselectthenumberofspecimensasdirectedinTestMethodsD2060.5.DimensionsandPermissibleVariations5.1ZippersshallconformtothedimensionslistedinTables1-4.5.2Tables2an...
