DIN-7984：2009(E)

            !# #!$%&'(()# $* + $,-.)&'/'&'&(0010  !  #$2  3   4 56+(789)''7'/! :;  : **+;  (789)''7'/=(789)'')&) $     +1111.10DIN7984:2009-06ContentsPageForeword..............................................................................................................................................................31Scope......................................................................................................................................................42Normativereferences............................................................................................................................43Dimensions.............................................................................................................................................54Technicaldeliveryconditions..............................................................................................................85Reducedstrength..................................................................................................................................85.1Screwsmadeofsteel(otherthanstainless).......................................................................................85.2Stainlesssteelscrews...........................................................................................................................96Designation............................................................................................................................................9AnnexA(informative)Massofsteelscrews..................................................................................................10Bibliography......................................................................................................................................................112DIN7984:2009-06ForewordThisstandardhasbeenpreparedbyWorkingCommitteeNA067-03-01AAVerbindungselementemitAußen-gewindeoftheNormenausschussMechanischeVerbindungselemente(FastenersStandardsCommittee).TheDIN4000-160-2tabularlayoutofproductpropertiesshallapplytoscrewscoveredinthisstandard.AmendmentsThisstandarddiffersfromDIN7984:2002-12asfollows:a)normativereferenceshavebeenupdated;b)inTable1,footnotef,thevalueoflgmaxhasbeencorrectedto≈3P;c)thetestprocedurein5.1hasbeenupdated;d)thedesignationhasbeenmodified;e)thestandardhasbeeneditoriallyrevised;f)screwsmadeofnon-ferrousmetalshavebeendeleted;g)theangleofthebottombearingfaceisnowincluded;h)theminimumultimatetensileloadforstainlesssteelscrewsisnowincluded;i)therangeofcommerciallengthsofshortscrewshasbeenextendedtoincludesizeM18.PreviouseditionsDIN7984:1961-03,1967-12,1970-12,1985-05,2002-123DIN7984:2009-061ScopeThisstandardspecifiespropertiesforsizesM3toM24hexagonsocketheadcapscrewswithlowheadofproductgradeAasinDINENISO4759-1,madeofsteelandstainlesssteel.Wherescrewsaretocomplywithspecificationsotherthanthosegiveninthisstandard,theseshallbespecifiedinaccordancewiththerelevantstandards(e.g.DINISO261,DINISO965-2,DINENISO898-1,DINENISO3506-1andDINENISO4759-1).Screwsasspecifiedinthisstandardcannotbeusedintheformofscrewassemblieswithcaptivewashersastheassociatedcomponents(e.g.washers)wouldrequireasmallerradiusbelowthescrewhead,whichcouldseriouslyreducethestrengthofthescrewhead.NOTEDuetotheirheaddesign,screwsasinthisstandardmaynotbecapableofwithstandingfullloading(seeClause5).2NormativereferencesThefollowingreferenceddocumentsareindispensablefortheapplicationofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.DIN962,DesignationsystemforfastenersDINEN20225,Fasteners—Bolts,screws,studsandnuts—SymbolsanddesignationsofdimensioningDINEN26157-1,Fasteners—Surfacediscontinuities—Bolts,screwsandstudssubjecttogeneralrequirementsDINENISO898-1,Mechanicalpropertiesoffastenersmadeofcarbonsteelandalloysteel—Part1:Bolts,screwsandstudswithspecifiedpropertyclasses—CoarsethreadandfinepitchthreadDINENISO3269,Fasteners—AcceptanceinspectionDINENISO3506-1,Mechanicalpropertiesofcorrosion-resistantstainlesssteelfasteners—Part1:Bolts,screwsandstudsDINENISO4042,Fasteners—ElectroplatedcoatingsDINENISO4753,Fasteners—EndsofpartswithexternalISOmetricthreadDINENISO4759-1,Tolerancesforfasteners—Part1:Bolts,screws,studsandnuts—ProductgradesA,BandCDINENISO10664,HexalobularinternaldrivingfeatureforboltsandscrewsDINENISO10683,Fasteners—Non-electrolyticallyappliedzi