socket set screw points - fastenal · identification guide 9703145 fastener identification guide...

Buttonhead • Lowprofileheaddiameteristwicetherivetbodydiameter,providingadequatebearingsurfacefornearlyallapplications

• Open-endbuttonheadrivetsofferthebroadestselectionofsizesavailable.

Large Flange • Providegreaterbearingsurfaceforfasteningsoftandbrittlefacingmaterialsandoversizefacingholes

• Workwellwithsoftmaterials,wheretheincreasedflangediameterprotectstheintegrityoftheapplication

Countersunk • 120°countersunkrivetsforapplicationswhereflushappearanceisrequired

• Moisture-resistant

Closed-End • Upto45%greatershearandtensilestrengthoverequivalentopenendrivets

• 100%mandrelretention• Idealforelectricorelectronicsapplications

NUTS

Coil Nuts: Providestemporaryclampingaroundconcert.DesignedtobepairedwithCoilBolts.

Finished Hex Nuts: Hexagonalshapednutswithinternalscrewthreads.Finishedhexnutsareoneofthemostcommonnutsused.

Hex Jam Nuts: Low-Profilenutsthatarenormallyhalfoftheheightofastandardnut.Theyaretightenedagainsttheworksurfaceandusedinsituationswhereastandardnutwouldnotfit.

Hex Machine Nuts: Machinescrewnutsarecommonlyusedwithmachinescrewsandfeatureaflattopandchamferedcorners.Theyusuallyhaveasmallerwrenchsizethanaregularfinishedhexnut.

Heavy Hex Nuts: Slightlylargerandthickerthanastandardhexnut.Becauseoftheirsecureholdanddurabilitytheyareusuallyusedforlargediameterandhighstrengthboltapplications.

Top Lock Nuts: Uniquelyshapedthreadsprovideavibrationresistantfrictionfit,sothenutstaysput.Theseallmetallocknutswithstandhighertemperaturesthannyloninsertlocknuts.Topthreadsectionisdeformedtocreatetwoorthreelockingzones;theystarteasilybyhand,thenmustbewrenchedintofinalposition.GradeCisequivalenttoGrade8.

Nylon Insert Locknuts (Nylocks): Anyloninsertlocknutismostfrequentlyusedtoresistunwantedlooseningandvibrationwithinitsapplication.

Nylon Insert Jam Locknuts: Anyloninsertjamlocknutisverysimilartothestandardnyloninsertlocknutinthefactthatitismostfrequentlyusedtoresistunwantedlooseningandvibrationwithinitsapplication,butisshorterthanastandardnyloninsertlocknut.

Two Way Lock (Reverse Lock) Nuts: Uniquelyshapedthreadsprovideavibrationresistantfrictionfitkeepingthenutinplace.Theseallmetallocknutswithstandhighertemperaturesthannyloninsertlocknuts.WithReversiblelocknuts,thedeformedthreadsareinthecenterofthenut.Notreusable.

Flange Top Lock Nuts: Sameasatoplocknutbutwithanenlargedcircularbasethatdistributesheavypressuresequallyinordertoassureasecurehold.Ofteneliminatestheneedforanadditionalwasher.Largebaserequiresagreateramountoftorquetoloosenandwillcoveranoversizedorpoorlyalignedhole.

Serrated Flange Nuts: Enlargedcircularbasedistributesheavypressuresequallyinordertoassureasecurehold.Largebaserequiresagreateramountoftorquetoloosenandwillcoveranoversizedorpoorlyalignedhole.

Castle Nuts: Greatforbothgeneralpurposefasteningandforlocking.Justinsertacotterpinorsafetywirethroughtheslotsandthedrilledholeinthefastener.

Slotted Nuts: Opposingslotsarecutintotheendoppositethebearingsurfacethroughthecentersoftheflats.Theslotsareusedfortheinsertionofacotterpinorsafetywireandthroughadrilledholeinthematingfastener.Thiscreatesasecureholdthatpreventslooseningorunscrewing.

Hex Coupling Nuts: Designedtojointwoexternallythreadedobjects,usuallythreadedrod,together.

Cap/Acorn Nuts: Usedtocoverexposedthreadedstud,rod,andboltendswithadome-likecap.Thisprovidessafetyandafinishedlooktotheexposedthreadedend.

K-Lock Nuts: Commonlyreferredtoas“KepsNuts”,theseareusedasageneralpurposenutformoderateloadassemblies.Theyconsistofanutassembledwithafreespinningwasher.Theteethpatternofthewasherbiteintoboththenutandthebasematerialtopreventlooseningcausedbyvibration.

Self-Clinching Nuts: Madeofheat-treatedsteel,stainlesssteel,oraluminumandaredesignedtobeinstalledintoapre-drilledorpunchedholesothenutisflushonthebackside.Generallyinstalledinsheetmetalorotherthinmaterialthatistoothinfortappingthreads.

Spring Nuts: AvailableinFlat,J,UandRectangularstyles,theseone-piece,self-lockingnutspreventscrewsfromlooseningduringvibration.Thesenutsallowforfast,easyassemblyandreducetheneedforadditionalfasteners.

Hex Panel (Pipe) Nuts: Panelnutisageneralpurposenutusedintightareaswhereathinnutisnecessary.Zincplating,retardsthecorrosionrateinanormalatmosphere.

Cage Nuts: Asquarenutwithaspringsteelcagearoundit.Twowingsonthespringsteelcagecanbecompressedandreleased,allowingforeasyinstallationandminoralignmentadjustmentsduringapplication.

Tee Nuts: Internallythreadedfastenersusedtofastenwood,particleboard,orplastic,leavingaflushsurface.Theyhavealong,thinbodywithaflangeatoneendthatoftenhaveprongsorserrations.

Wing Nuts: Permitsfrequentandrapidassemblyanddisassemblywithouttheneedofatool.Thewingsenablethenuttobeturnedbyhandwithjustfingerpressure.AvailableinColdForged,Stamped,andNylonInsertStyles.

Palnuts: Featuredwithalargewasherbasethatallowsthemtospanalargeoroddshapedhole.Theyareabletodistortunderloadandreturntotheiroriginalshapebecauseoftheirspring-likesteel.Whenproperlytightened,thesteelcanbeflexibleenoughtoprovideaself-lockingaction.

FASTENER IdENTIFIcATIoN

GUIdE

9703145FastenerIdentificationGuide•4.13KM•PrintedintheUSA

1. SpecificationwithGrade: ASTM,SAE,DIN,ISO,etc. Example:SAEJ429Grade82. NominalSize(d) Example:1/2inch3. ThreadPitch:Example:134. OverallLength(L):Example:3inch

5. ProductName Example:HexCapScrew6. Finish-Example:Zinc&YellowChromate7. CompleteSpec-SAEJ429Grade8,1/2-13x3 HexCapScrew,Zinc&YellowChromate

ForHexHeadBoltsandCapScrews,measureundertheheadtothetip ForFlatHead

Screws,measurefromtiptotip.

ForallotherScrews,measureunderthe

headtothetip.

ForOvalHeadScrews,measurefromthebase

oftheovaltothetip.

HOW TO SPECIFY

LOCKBOLT RIVETS RIVET HEad STYLES FEaTURES/BENEFITS

HowdoImeasurethelengthofthefastener?

THREad FORMING FaSTENERS - THREad aNd POINT STYLES

TypeAscrewsfeaturespacedthreadswithagimletpoint.Theyaretypicallyusedinthinsheetmetalsandwood.

TypeABissimilartoTypeA,butwithmorethreadsperinch.Thistypeofscrewisrecommendedforsheetmetalsandwood.

TypeBscrewsfeaturethesamethreadsperinchastheTypeAB,buthaveabluntpointandincompletestartingthreads.Theyareintendedforsheetmetalsandwood.

Self-piercingscrewsareusedinthinsheetmetalsinordertoavoidpre-drilling.

Woodscrewsfeaturesingleleadthreadswithsharpcrests,andagimletpoint.Thethreadscanberolledorcutatthemanufacturer’soption.

Aself-drillingwoodscrewwithacuttingslotinthescrewtip.Foruseinwoodwhenpre-drillingisn’tpractical.

TypeFscrewshavemachinescrewdiameter-pitchcombinationsapproximatingUnifiedForm.Thesehaveabluntpointandtaperedstartingthreadshavingmultiplecuttingedgesandchipcavities.

BTorType25threadcuttingscrewshavespacedthreadswithabluntpointandtapererdenteringthreadslikeTypeB,butwithmultiplecuttingedgesandchipcavities.Theyareintendedforsoftermaterialsorthinsheetmetals.

TypeTorType23threadcuttingscrewshavemachinescrewdiameter-pitchcombinationsapproximatingUnifiedForm.Thesehaveabluntpointandtaperedstartingthreadshavingasinglecuttingedgeandfluteforchipremoval.

Type1orTypeDthreadcuttingscrewshavemachinescrewdiameter-pitchcombinationsapproximatingUnifiedForm.Thesehaveabluntpointandtaperedstartingthreadshavingasinglecuttingedgewithchipcavity.

Threadrollingscrewshaveatri-roundcrosssectiontoprovidereliefareaswhenrollinginternalthreads.Usedinmetalstoeliminatetapping.

Metallicdrivescrewswithmultiplestartthreadswithalargehelixangleandapilotpoint.Usedforpermanentconnectionsinmetalsandplastics,installedbyhammeringthescrewinplaceasopposedtothreading.

Self-drillingscrewsareusedtoavoidpilotholedrilling.Thescrewwilldrillitsownholeandtapitsownthreads.Thedrillpointmustpenetratethematerialcompletelybeforeitbeginstappingthreads.Typicallyusedinsheetmetalandthinsteelplate.

A

General Point appearance Type description

AB

B

Self-piercing

WoodScrew

17

F

BTor25

Tor23

1orD

Tri-lobular

U

CSD

or

BSD

SOCKET SET SCREW POINTS

Themostwidelyusedstyleofsetscrew.Itisdesignedforfast,permanentandsemi-permanentlocationofpartsonshaftsonupto10to15HRCpointsofthescrewhardness,wherehightighteningtorquesareimpractical.

Intendedforpermanentsettings.Thepointshouldfitcloselytothediameterofthedrilledholeoragainsttheflat.Oftenreplacesdowelpins.Workswellagainsthardenedmembersorhollowtubing.

Itisthepreferredstylewherefrequentadjustmentsarerequiredorwhereexcessiveindentationoftheshaftisnotdesirable.Alsousedwhenseatingagainstangularsurface.

Designedforfrequentresettingorrelocatingonhardsteelshaftsandwhereminimaldamagetoshaftsisnecessary.Sometimesusedasadjustingscrew.

Designedforquickandpermanentlocationofgears,collars,pulleysorknobsonshafts.Counterclockwiselockingknurlsresistscrewloosening.Resistsmostseverevibration.

Asetscrewwithasharpconicalpointusedforpermanentsettingofamachinepartonhardenedorsoftshafts.Thedeeppenetrationitoffersgivethisstylethehighesttorsionalandaxialholdingpower.

CupPoint

General Point appearance Type description

Half-DogPoint

OvalPoint

FlatPoint

KnurledPoint

ConePoint

Note Alloysteelsocketsetscrewsareintendedforcompressionapplicationsonlyandarenotnormallysubjectedtoembrittlementtests.Theiruseintensileapplicationswouldrequirefurtherconsiderationofthealloyusedandtheheattreatment.

Rivet Code ExplanationExample: A-FirstLetter. . . . . . . . . . . Rivetmaterial(A-Aluminum,S-Steel,C-Copper,SS-StainlessSteel)ABL6-6A B-SecondLetter. . . . . . . . StyleofHead(B-Buttonhead,C-Countersunk) L-ThirdLetter(ifany). . . . LargeFlangeHead 6-FirstNumber. . . . . . . . . BodyDiameterin32nd’s 6-SecondNumber. . . . . . MaximumGripLentghin16th’s A-FinalLetter . . . . . . . . . . A-AluminumMandrel,S-StainlessSteelMandrel,B-BrassMandrel, C-CopperPlatedSteelMandrel,CLD-Closed-End,MG-Multi-Grip, QL-Q-Lok,LB-LokBolt.Noletterindicatessteelmandrel.

Your Local Fastenal Store:

HEad STYLES

Bugle

BindingUndercut

Fillister

DRIVES

CrossRecessTypeII(Frearson)

CrossRecessTypeI(Phillips)

CrossRecessTypeIA(Pozidriv®)

CrossRecessSquareCombo(Quadrex®)

Slotted

CombinationPhillips/Slotted

Hex/Slotted-Hex

SixLobe(Torx®)

Square(Robertson®)

HexSocketDrive

ButtonWasher

Pan

RoundHead

Flat82°

Flat100°

FlatUndercut

IndentedHex

IndentedHexWasher

SerratedHexWasher

Truss

RoundWasherHead,K-LathorModifiedTruss

Wafer

Oval

Round(U-Drive)

Hex Cap ScrewHexcapscrewsfeatureawasherfaceonthebearingsurface,achamferedpoint,andtighterbodytolerancesthanhexbolts.

Hex BoltSimilartohexcapscrew,hexboltsdonotrequireawasherfaceorapointedendandhaveagreatertolerancerangeinthebody.

Socket Head Cap ScrewSocketheadsfeatureaninternalhexagonaldrivesocketandclosetolerancesforprecisionassembly.

Button Head Socket Cap ScrewButtonheadsfeatureadomeshapedhead,thoughthisfeaturereducesthetensilecapacity.

Flat Head Socket Cap ScrewFlatheadsfeaturean82°countersunkheadforflushconnections.Likethebuttonheads,thisfeaturereducesthetensilecapacity.

Low Head Socket Cap ScrewLowheadsaresimilartostandardsocketheads,butwithashorterheadforapplicationswhereclearanceisanissue.Thisheadconfigurationalsoreducesthestrengthcapacity.

Carriage BoltAroundheadboltwithasquareneckunderthehead.Thesemustbetightenedwithanut.

Plow BoltSimilartoacarriagebolt,thesehaveaflatheadtomaintainasmoothsurface.Typicallyusedonplows,roadgraders,andsimilarequipment.

Dome Head Plow BoltSimilartoplowbolts,butwithadomedheadwhichtakesthebruntofthewearwhenusedinplowapplications.

Elevator BoltElevatorboltsfeatureawidecountersunkheadwithashallowbearingsurfaceandsquareneck.Typicallyusedinconveyorsystems.

12 Point Flange ScrewAlsoknownasaferrycapscrew,thepointsontheheadmaketighteningeasieronthishighstrengthflangescrew.

WaSHERS & TYPE a PLaIN LOW CaRBON FLaT WaSHER SPECIFICaTION & dIMENSIONS

Schnorr® Safety Washer: Thesesafetywashersareintheformofadiscspringwhichisserratedonbothsidesandoftrapezoidalcrosssection.Theirdiametersarematchedtoscrewdimensions.Theouterdiameterofthewasherismatchedtotheheaddiameterofpan-headandhexagonsocketheadcapscrews.

Flat Washer: Intendedforthegeneraluseundertheheadofaboltornutinordertoprovideasmoothbearingsurfaceanddistributethefastenerloadoverawidersurfacearea.

Internal/External Tooth Washer: Teetharefeaturedontheinnerandouterdiameterofthewasherformaximumholdingpower.

Fender Washer: Aflatwasherwithalargeouterdiameter.Thesearecommonlyusedinauto-bodyrepair,sheetmetal,plumbing,andelectricalapplications.

External Tooth Washer: Featuresteethontheouterdiameterofthewashertoprovideadditionalholdingpower.Usethemwithfastenersthathaveheadslargeenoughtomakecontactswiththewasherteeth.

Internal Tooth Washer: Featuresteethontheinnerdiameterofthewasher.InternalToothWashersworkbestwithsmallscrewheads.Theyareusedtopreventsnaggingorscratchingandwhereappearancewarrantsthattheteethbehidden.Theteethlockintothescrewheadornuttopreventloosening.

Split Lock Washer: Alsoknownasspringlockwashers,thesesplitlockwashersprovideapositivelockingaction.Spring-Liketakeupcompensatesforlooseningcausedbyslightmaterialwear.

Nord-Lock® Washer: Thesewashersconsistofapairofwasherswithawedge-lockingaction,whichisauniquemethodthatusestensioninsteadoffriction.Thekeyisthedifferenceinangles.Sincetheangle“a”islargerthantheangle“b”,thepairofwashersexpandsmorethanthecorrespondingpitchofthethread.Nord-Lock®washerspositivelylockthefastenerinajointwhichissubjectedtoextremevibrationordynamicloads.Thisuniqueboltsecuringsystemusestensiontomakethebolt-self-locking.

Belleville Washer: Alsoknownasconicalwashers,Bellevillewashersaredesignedtomaintaintensioninboltedassemblieswithspring-likeaction.Thiscreatesatightholdanduniformpressurethatremainsconstantthroughheatandvibrationthatmightshakestandardwashersloose.

Rivet Styles Features/Benefits Materials AvailableOpen End • Forblindfasteningwherethereisnoaccessto

oppositesideofwork• Simpletoinstall• Widevarietyofheadstylesandlengthsavailable

• Steel/steel• Aluminum/aluminum• Aluminum/steel• Stainless/stainless• Stainless/steel• Copper/brass• Copper/steel

Closed End • Moisture-resistantduetotightseal• Greatershearandtensilestrength• Mandrelisretained100%oftime

• Aluminum/steel• Aluminum/aluminum• Stainless/stainless

Multi-Grip • Extendedgriprangecapacity• Reducesinventory(fewersizesrequired)• Useasastandardopenendrivet• Nospecialtoolsrequired

• Aluminum/steel• Steel/steel

Self-Plugging • Retainedmandrelincreasesshearandtensilestrength• Useinhighvibrationapplications• Mandrelbreaksflushwhenusedinmid-griprange• Moisture-resistantduetotightseal• Upto3/16"diameter

• Steel/steel

Peel • Highclampup• Highshearstrength• Createsawidebearingsurface

• Aluminum/steel

Plastic • Precision-molded,all-nylon• Securelockpreventspull-out• Fastenplastictoplastic,plastictometalorplastic

tofiberglass

Rivet Styles Features/BenefitsC6L® • HighShearStrength

• HighControlledClamp

C50L® • ExceptionalShearandTensileStrength

Magnagrip® • WidegripRange• HighShearStrngth

Hucktainer® • HighshearStrngth• JoinsCompositePanelstoMetal• LeakResistent• HighSpeedInstallation

Bom Rivet® • ForuseonBlindsidedapplication• HighclampForce• HightensileandShearstrength• VibrationResistant• HighGripCapability

RIVETS

Square Nuts: SquareNuts,orfoursidednuts,areusedmostofteninchannelapplications.Squarenutsofferalargesurface,butdorequiremoreefforttosecure.

9703145