ISO 10511 2025.docx

InternationalStandardISO10511Thirdedition2025-06©ISO2025FastenersPrevailingtorquehexagonnutsThinnuts(withnon-metallicinsert)FixationsEcroushexagonauxautofreinesEcrousbas(aanneaunonmetallique)ReferencenumberISO10511:2025(en)COPYRIGHTPROTECTEDDOCUMENT©ISO2025Allrightsreserved.Unlessotherwisespecified,orrequiredinthecontextofitsimplementation,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbeloworISO*smemberbodyinthecountryoftherequester.ISOcopyrightofficeCP401Ch.deBlandonnet8CH-1214Vernier,GenevaPhone:+41227490111Email:copyrightiso.orgWebsite:www.iso.orgPublishedinSwitzerlandContentsPageForewordiv1 Scope12 Normativereferences13 Termsanddefinitions24 Dimensions25 RequirementsandreferenceInternationalStandards46 Markingandlabelling56.1 Markingonproduct56.2 Labellingonpackage57 Designation5AnnexA(normative)ThinnutsinsteelandstainlesssteelwithD<M5notincludedinISO898-2andISO3506-26Bibliography9ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.TheproceduresusedtodevelopthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inparticular,thedifferentapprovalcriterianeededforthedifferenttypesofISOdocumentshouldbenoted.ThisdocumentwasdraftedinaccordancewiththeeditorialrulesoftheISO/IECDirectives,Part2(SeeWWW.iso.org/directives).ISOdrawsattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvetheuseof（八）patent(三).ISOtakesnopositionconcerningtheevidence,validityorapplicabilityofanyclaimedpatentrightsinrespectthereof.Asofthedateofpublicationofthisdocument,ISOhadnotreceivednoticeof（八）patent(三)whichmayberequiredtoimplementthisdocument.However,implementersarecautionedthatthismaynotrepresentthelatestinformation,whichmaybeobtainedfromthepatentdatabaseavailableatwww.iso.org/patents.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.Foranexplanationofthevoluntarynatureofstandards,themeaningofISOspecifictermsandexpressionsrelatedtoconformityassessment,aswellasinformationaboutISO'sadherencetotheWorldTradeOrganization(WTO)principlesintheTechnicalBarrierstoTrade(TBT),SeeWWW.iso.org/iso/foreword.htmLThisdocumentwaspreparedbyTechnicalCommittee1SOTC2,Fasteners,SubcommitteeSC12,Fastenerswithmetricinternalthread,incollaborationwiththeEuropeanCommitteeforStandardization(CEN)TechnicalCommitteeCEN/TC185,Fasteners,inaccordancewiththeAgreementontechnicalcooperationbetweenISOandCEN(ViennaAgreement).Thisthirdeditioncancelsandreplacesthesecondedition(ISO10511:2012)whichhasbeentechnicallyrevised.Themainchangesareasfollows: thedesignprinciplesofthesenutshavebeenclarifiedinScope(seeNote); theuseofthinnutsandawarninginrelationtolowerstrippingresistancehavebeenaddedinScope;nutswithDVM5(notincludedinISO898-2andISO3506-2)havebeendealtwithinAnnexA: forsteelnutslquenchingandtemperingconditionshavebeenspecifiedinCIaUSe5inaccordancewithISO898-2fseeTable3); stainlesssteelnutshavebeenaddedinaccordancewithISO3506-2; M7,Ml8,M22,M27,M33andM39havebeenadded; thecountersinkanglehasbeenimprovedfrom90o-120otoIlOo-120o;一,maanddwminhavebeenspecifiedwithtwodecimalplaces;一wminf°rsizesDM5hasbeenchangedfromsmin-IT16toSmin-inordertohavealargerbearingsurfaceareaandthuslesscontactpressure; hnxforM20andM36hasbeenincreasedsothatregular,highandthinnutshaveanidenticalroomfortheprevailingtorquefeaturehma-mmin)toaccommodatethenon-metallicinsert;hIninhasthereforebeenincreasedinaccordancewiththespecifiedtolerance(seeTable2): specificationsformarkingandlabellinghavebeenaddedasClaUSe6.Anyfeedbackorquestionsonthisdocumentshouldbedirectedtotheuser'snationalstandardsbody.AcompletelistingofthesebodiescanbefoundatWWW.iso.org/members.htmLFastenersPrevailingtorquehexagonnutsThinnuts(withnon-metallicinsert)1 ScopeThisdocumentspecifiesthecharacteristicsofprevailingtorquehexagonthinnuts(withnon-metallicinsert),insteelandstainlesssteel,withmetriccoarsepitchthreadM3toM39landwithproductgradesAandB.NOTEThesenutsaredesignedwithanoverallheightequaltommin(asspecifiedinISO898-2andISO4035forstyle0)plustheprevailingtorquefeature.Theheightoftheprevailingtorquefeature(hna