DIN-78-2013-en

April2013TranslationbyDIN-Sprachendienst.Englishpricegroup5NopartofthistranslationmaybereproducedwithoutpriorpermissionofDINDeutschesInstitutfürNormunge.V.,Berlin.BeuthVerlagGmbH,10772Berlin,Germany,hastheexclusiverightofsaleforGermanStandards(DIN-Normen).ICS21.040.10!%%TM2024942:2013-04Schraubenüberstände,EnglischeÜbersetzungvonDIN78:2013-04Dépassementsdesvis,TraductionanglaisedeDIN78:2013-04©SupersedesDIN78:2001-03:2013-042Acommaisusedasthedecimalmarker.ContentsPageForeword.........................................................................................................................................................31Scope.................................................................................................................................................42Normativereferences.......................................................................................................................43Boltendprotrusions........................................................................................................................43.1Metricscrews....................................................................................................................................43.2Tappingscrews.................................................................................................................................6DIN78:2013-043ForewordThisstandardhasbeenpreparedbyWorkingCommitteeNA067-00-01AAReferenznormenundQualitätsmanagementoftheNormenausschussMechanischeVerbindungselemente(FMV)(FastenersStandardsCommittee).Attentionisdrawntothepossibilitythatsomeelementsofthisdocumentmaybethesubjectofpatentrights.DINshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.AmendmentsThestandarddiffersfromDIN78:2001-03asfollows:a)boltendprotrusionsfortappingscrewshavebeenincluded;b)theillustrationofboltendprotrusionsformetricscrewshasbeenrevisedandstudsarenolongerincluded.PreviouseditionsDIN78-1:1921-10,1925-02,1929-07,1965-09DIN78-2:1923-02,1925-02,1929-07DIN78:1929-07,1953-08,1975-09,1983-12,2001-03DIN78:2013-0441ScopeThisstandardspecifiesminimumboltendprotrusionsforgeneralpurposeassembliesofbolts,screwsandsimilarfastenerswithISOmetricscrewthreadinaccordancewithDIN13-28,andwithtappingscrewthreadinaccordancewithDINENISO1478.Theboltendprotrusionsspecifiedhereshallensurethefullloadbearingcapacityandfunctioningofthenut(internalthread).Theboltendprotrusionsspecifiedinthisstandarddonotapplywheredifferentboltendprotrusionstandardshavebeenspecifiedinspecificapplicationorproductstandards.2NormativereferencesThefollowingdocuments,inwholeorinpart,arenormativelyreferencedinthisdocumentandareindispensableforitsapplication.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.DIN13-28,ISOmetricscrewthreads—Coarseandfinescrewthreadsfrom1to250mmscrewthreaddiameter—Rootcross-sections,tensilestresscross-sectionsandpitchanglesDINENISO1478,TappingscrewthreadDINENISO4753,Fasteners—EndsofpartswithexternalISOmetricthread3Boltendprotrusions3.1MetricscrewsThefollowingapplies:—forboltswithhexagonnuts:TheminimumboltendprotrusionlPminshallbetwicethethreadpitchPplusthelengthoftheboltendprotrusionaccordingtoDINENISO4753thatexceedsdimensionu(asshowninFigures1,3and5).—forboltsassembledwithself-lockinghexagonnuts:TheminimumboltendprotrusionlPminshallbethreetimesthethreadpitchPplusthelengthoftheboltendprotrusionaccordingtoDINENISO4753thatexceedsdimensionu(asshowninFigures2,4and6).ForthreadpitchPDIN13-28applies.NOTEThenominallengthofbolts,l,iscalculatedfromtheclampinglengthplusthetotalnutheightandtheminimumboltendlPmin.DIN78:2013-045EXAMPLESFigure1—Boltend,typeCHFigure2—Boltend,typeCH,andself-lockinghexagonnutFigure3—Boltend,typeLDFigure4—Boltend,typeLD,andself-lockinghexagonnutFigure5—Boltend,typePCFigure6—Boltend,typePC,andself-lockinghexagonnutDIN78:2013-0463.2TappingscrewsTheminimumboltendprotrusionlPminshallbeequalto1,5timesthethreadpitchPplusthelengthoftheboltendyaccordingtoDINENISO1478(asshowninFigure7).Figure7—Boltend,typeR