PRECISION MACHINED NUTS

Features and Benefits

• MachinedNutsareheld100%squaretothetap.Theyaresuperiortocoldformedandpunchednutswhicharepushedontorotatingtapsandnotheldperpendiculartothetool.

• Cutthreadsrollfreelywithno“tight”spots.

• AllSPIROLthreadsaremanufacturedtostrictstandardswithspecificgages.

• Weprovidestrictlotcontrolandtraceability.

• Threadpitchdiameterallowancesareengineeredforeaseofassemblyafterplating.

• Unlikethoseofsomemanufacturers,ourproductsareclean,dry,burrfree,andreadytouse.

PRECISION MACHINED NUTS

STANDARD SPECIFICATIONS

MATERIAL

E Free-CuttingBrass

ASTMB16UNS36000

EN12164CW603NCuZn36Pb3

RoHSCompliant

K Plain

N BrightNickelPlate

FINISHES

Note:See page 8 for alternate materials and finishes.

SPIROLspecializesinthemanufactureofPrecisionMachinedNuts.Innovativeengineering,purpose-modifiedautomaticscrewmachines,andCNCmachinesyieldproductionratesthatpermitustoofferqualitypartsatpricingcomparabletolessprecisemanufacturingmethods.

SPIROLiscommittedtocontinuousimprovementinallfunctionalandoperationalareaswiththeobjectiveofconsistentlyexceedingourcustomers’expectations.

SPIROL offersengineeringresourcesaswellasstockinglocationsthroughouttheworldtobetterserveyourcriticaldeliveryneeds.

ThreadscutperpendiculartothefaceofaPrecision Machined Hex Nuteliminatecamber.

ThebearingsurfacesofaStamped Nutaretappedasasecondaryoperationbypushingontoarotatingtap.Therefore,thethreadcannotbeguaranteedtobeperpendiculartothebearingsurface.Thiscancreatecamber.

HexNutsarethemostversatileandwidelyusednutdesign.FinishedHexNutsareusedwithboltstolockJamNutsagainstfinishedsurfaces(see Jam Nuts on next page).

HeavyHexNutsarethickeracrosstheflatsthancomparableFinishedHexNuts.TheyarethestrongestHexNutsbecauseoftheirgreaterlengthofthreadengagement,andresistancetostretchingandwidening.OurstandardFinishedandHeavyHexNutsaredoublechamferedbutcanbemanufacturedwithasinglechamferandawasherface.

Forapplicationswherevibration,lateralmotion,orwedgetypeloadswilltendtoloosentheHexNut,itiscommontouseaJamNuttomaintainjointintegrity.TheHexNutisusedtoprovidethetensiontotheboltandtheJam

NutisusedtoprovideasecondaryloadtotheHexNut.TheJamNutisnotsubjecttothesameoperationalconditionsastheboltandHexNutandthereforelockstheassemblytogether.

SERIES H10 FINISHED HEX NUTS SERIES H11 HEAVY HEX NUTS

SPIROL DESCRIPTION: NT/ThreadSize/WrenchSizexThicknessMaterialFinishSeries#EXAMPLE: NT/.375-16/.562x.328EKH10

1Note:SPIROL converts wrench size and thickness to decimals for description.

7/16

1/2

9/16

11/16

3/4

Wrench Size

.250–20

.312–18

.375–16

.437–14

.500–13

7/32

17/64

21/64

3/8

7/16

HEX NUTS, H10 AND H11

H2

Thickness

Thread Size

15/64

19/64

23/64

27/64

—

H1

Thickness

1/2

9/16

11/16

3/4

—

FWrench Size

FH10 Finished Hex H11 Heavy Hex

1/4–20

5/16–18

3/8–16

7/16–14

1/2–13

Series H10 Series H11F H2H1

Heavy Hex Nut

Heavy Hex Jam Nut

SERIES H20 HEX JAM NUTSSERIES H21 HEAVY HEX JAM NUTS

AJamNutistypically2/3thethicknessofitsrespectiveHexNutcounterpart.

AHeavyHexorFinishedHexNutistightenedagainsttheworksurfaceandaJamNutissecuredagainsttheHexNuttoensurethatthenutdoesnotbecomeloose.

SeriesH20HexJamNutsareusedwithSeriesH10FinishedHexNuts.

SeriesH21HeavyHexJamNutsareusedwithSeriesH11HeavyHexNuts.

2

F H2H1

Series H20 Series H21

SPIROL DESCRIPTION: NT/ThreadSize/WrenchSizexThicknessMaterialFinishSeries#EXAMPLE: NT/.375-16/.562x.219ENH20

Note:SPIROL converts wrench size and thickness to decimals for description.

7/16

1/2

9/16

11/16

3/4

Wrench Size

.250–20

.312–18

.375–16

.437–14

.500–13

5/32

3/16

7/32

1/4

5/16

HEX JAM NUTS, H20 AND H21

H2

ThicknessThread Size

11/64

13/64

15/64

17/64

—

H1

Thickness

1/2

9/16

11/16

3/4

—

FWrench Size

FH20 Hex Jam H21 Heavy Hex Jam

1/4–20

5/16–18

3/8–16

7/16–14

1/2–13

SERIES H30HEX MACHINE SCREW NUTS

Thesegeneral-purposeHexNutsaredesignedtobeusedwithmachinescrewsinlighttomoderateloadsorwithboltsforheavyloads.

3

SPIROL DESCRIPTION: NT/ThreadSize/WrenchSizexThicknessMaterialFinishSeries#EXAMPLE: NT/.164-32/.344x.125ENH30

Note:SPIROL converts wrench size and thickness to decimals for description.

3/16

3/16

1/4

5/16

5/16

11/32

3/8

3/8

7/16

7/16

9/16

5/8

F

Wrench Size

2–56

3–48

4–40

5–40

6–32

8–32

10–24

10–32

12–24

1/4–20

5/16–18

3/8–16

Thread Size

1/16

1/16

3/32

7/64

7/64

1/8

1/8

1/8

5/32

3/16

7/32

1/4

HEX MACHINE SCREW NUTS, H30H

Thickness

.086–56

.099–48

.112–40

.125–40

.138–32

.164–32

.190–24

.190–32

.216–24

.250–20

.312–18

.375–16

F HSeries H30

SERIES H31 SMALL PATTERNHEX MACHINE SCREW NUTS

SmallPatternHexMachineScrewNutsaredesignedtobeusedforlightloads.Inapplicationswherethereislimitedroomforwrenching,thesmallerhexsizeisanadvantage.

AnythreadcanbemadeintoaSmallPatternMachineScrewNut.Aslongasthereisenoughclearancebetweenthewrenchsizedistanceandthethread,nominalthreadsizesareavailableinanynutpattern.Thisallowsanumberofuniquecombinationswhichcanbemadetoorderinadditiontoourstandardoffering.

F HSeries H31

4

SPIROL DESCRIPTION: NT/ThreadSize/WrenchSizexThicknessMaterialFinishSeries#EXAMPLE: NT/.138-32/.250x.094EKH31

Note:SPIROL converts wrench size and thickness to decimals for description.

3/16

1/4

1/4

1/4

5/16

5/16

F

Wrench Size

4–40

5–40

6–32

8–32

10–24

10–32

Thread Size

1/16

3/32

3/32

3/32

7/64

7/64

SMALL PATTERN HEX MACHINE SCREW NUTS, H31H

Thickness

.112–40

.125–40

.138–32

.164–32

.190–24

.190–32

PanelNutsareoftenusedwhereveralightdutyprecisionfastenerisneeded.TypicallyPanelNutsaredesignedtobethinandhavewidthdimensions(F)closetothediameterofthefastenertheysecure.Thiscreatesalowprofileusedinlightdutyapplicationsbecausetheyhavelowthreadcounts.

ApplicationsforPanelNutsincludeswitchhardware,potentiometercontrols,cableglandfastenersandlightweightlocknuts.

Series H40 — Hexagon Panel Nuts• Exteriorchamferedonallsurfaces• Nothicknessvariations• Nocutoffburrs

Series R10 — Knurled Round Panel Nuts• Exteriorchamferedonallsurfaces• Cleanfullformedknurlsfreeofsliversandflakes

SERIES H40 HEX PANEL NUTSSERIES R10 ROUND PANEL NUTS

5

STRAIGHT KNURL

F H FH

Series H40

SPIROL DESCRIPTION: NT/ThreadSize/WrenchSizeorDiameterxThicknessMaterialFinishSeries#EXAMPLE: NT/.250-40/.312x.062EKH40

Note:SPIROL converts wrench size, diameter and thickness to decimals for description.

PANEL NUTS, H40 AND R10

1/29/325/163/85/167/161/29/169/165/83/4

9/16———3/8—1/29/165/8—3/4

.125–27

.190–48

.250–32

.250–32

.250–40

.312–32

.375–32

.469–32

.469–32

.500–28

.625–27

3/32———3/32—3/325/643/32—1/8

1/83/641/161/161/167/643/325/643/321/83/32

HFThread SizeThickness

H40 Hex R10 Round

Wrench Size DiameterThicknessHF

1/8–2710–481/4–321/4–321/4–405/16–323/8–3215/32–3215/32–321/2–285/8–27

SERIES C10 CLOSED CAP NUTSSERIES C20 OPEN CAP NUTS

CapNuts(AcornNuts)areavailableintwobasicconfigurations,openandclosed.SPIROL®CapNutsareprecisionmachinedtowithstandsubstantiallyhighertighteningtorquewithoutstrippingorhavingaboltbreakthroughthedome,ascanhappenwithtwopieceequivalentcapnuts.Generouscounterboresallowforanunthreadedportionofthematingcomponenttoprotrudeabovethesurface.

Series C10 — Closed Cap NutsClosedCapNutsdecorativelyfinishtheexposedendsofbolts.Theyoffer

protectionfromthesharpedgesofbolts.Completelymachineddomesurfacesensuresafehandlingandsmoothandbrightfinishing.

Series C20 — Open Cap NutsOpenCapNutsareusedforassemblyofboltswhoselengthsareimpreciseandintendedtogoallthewaythroughthefastener.Cleanmachiningprovidesasuperiorsurfaceforplatingandoffersaqualityappearance.

FH2H1

Series C20Series C10

6

SPIROL DESCRIPTION: NT/ThreadSize/WrenchSizexHeightMaterialFinishSeries#EXAMPLE: NT/.250-20/.500x.406ENC10

Note:SPIROL converts wrench size and height to decimals for description.

CAP NUTS, C10 AND C20

1/41/45/165/163/83/83/87/161/27/16

FWrench

Size.112–36.112–40.138–32.164–32.190–24.190–32.216–24.250–20.250–20.250–28

Thread Size

1/41/49/329/3211/3211/3211/323/813/323/8

H1

C10Closed

C20Open

15/6415/641/41/49/329/329/3221/643/821/64

H2

1/29/161/29/165/85/83/43/43/43/4

FWrench

Size5/16–185/16–185/16–245/16–243/8–163/8–247/16–147/16–201/2–131/2–20

Thread Size

13/327/1613/327/161/21/29/169/169/169/16

H1

C10Closed

C20Open

3/83/83/83/827/6427/641/21/21/21/2

H2

HeightHeightHeightHeight

4–364–406–328–3210–2410–3212–241/4–201/4–201/4–28

.312–18

.312–18

.312–24

.312–24

.375–16

.375–24

.437–14

.437–20

.500–13

.500–20

SERIES T10KNURLED THUMB NUTS

ThumbNutsareusedinapplicationswhereafastenerneedstobeadjustedandsecuredtoafingertightdegree.

PopularapplicationsforThumbNutsincludepanelmounts,homehardware,tensionadjustmenthardwareandelectricalapplications.

OurmachiningprocessensuresthatSeriesT10ThumbNutsaremachinedwithnothicknessvariationsorburrs.Heavycountersinkspermittighteningovertheshankportionofboltsthatcanextendslightlyabovethesurface.

F H

Series T10

7

SPIROL DESCRIPTION: NT/ThreadSize/DiameterxHeightMaterialFinishSeries#EXAMPLE: NT/.190-24/.500x.328EKT10

Note:SPIROL converts diameter and height to decimals for description.

RADIUS STEM, SINGLE KNURL THUMB NUTS, T10

1/4

3/8

3/8

7/16

1/2

1/2

5/8

11/16

F

2–56

4–40

6–32

8–32

10–24

10–32

1/4–20

5/16–18

1/4

1/4

1/4

5/16

21/64

21/64

3/8

13/32

HThread Size

Diameter Height

.086–56

.112–40

.138–32

.164–32

.190–24

.190–32

.250–20

.312–18

SPECIALS

SPIROL’sEngineerscanassistinidentifyingthebeststandardPrecisionMachinedNuttomeetthespecificapplicationperformancerequirements.SPIROLcanalsoproducespecialvariationsofourstandardlinesofMachinedNuts.IfauniquespecialMachinedNutisrequired,SPIROLwilldesignandproducethespecialforeitherloworhighvolumeapplications.

Examplesofspecialofferingsinclude:

Special SizesSPIROL’sstandardlineofPrecisionMachinedNutscanbeeasilyalteredtoincludemetricsizes,speciallydesignednon-standardthreads,andnon-standardthreadpitchconfigurations.OtherspecialvariationsincludeHexagonCouplingNuts,TamperproofNuts,BoltNuts,RailroadNuts,LampandLightingParts,PipeCouplings,CompressionNuts,andmore.Shouldyourrequirementcallforround,hex,squareorotherexternalconfiguration,oversizedthreadsforplating,finelycontrolledinternaldiametersorevenspecialmachinedfeatures,SPIROLcanaccommodateyourrequest.

SPIROLspecializesinthelow-volumemanufactureofspecialtyMachinedNutsupto.750”(19mm)inhexagonaland.812”(21mm)roundconfigurations.

Special ThreadsPrecisionNutscanbemachinedwithanyinchormetricthreadtoANSIH.28orJISstandard,leftorright-handpipethreads,ANSIB1.1,ANSIB1.13M.

Special MaterialsInadditiontothestandardbrass,SPIROL’sproductiontechnologyenablesustoproduceMachinedNutsoutofavarietyofmaterials.Themostcommonalternatematerialsarealuminumand300seriesausteniticstainlesssteel;howeverwealsoproducelowvolumeNutsoutof12L14lowcarbonsteel.MachinedNutsmadefromalternatematerialsaremadetoorderinlowvolume.

Special FinishesSPIROLcanprovidevirtuallyanyfinishonMachinedNuts.Standardfinishesareplainandbrightnickelplated.Alternatefinishesincludepassivated,blackoxide,zincplate,zincplatewithchromate(inclear,yellow,oliveorblackcolor),brightacidtin,andphosphatecoated.

Special Surface ConfigurationSPIROLcanmachineproductswithmultiplediameters,grooves,knurls,threads,chamfers,heads,centerholes,sideholes,aswellasthosethat

areturned,shaved,broached,backdrilled,andcounterbored.Inaddition,KnurledThumbNutscanbeprovidedwithoptional

“face”knurlshelplockthepartsinplace.

8

Application:A manufacturer of toggle switches requested that SPIROL manufacture a cost-effective, custom Hex Panel Nut for their European market. This large, special Machined Nut had a 15mm wrench size and a M13 thread.

Solution:SPIROL Engineering recommended the use of a standard SPIROL Series H40 Hex Panel Nut body with a special M13 thread.

SPIROL’s standard Panel Nut has a .625” wrench size, converting to approximately 15.9mm across the flats versus the originally requested 15mm wrench size. The customer was early enough in the design stage to change to the standard .625” wrench size. By using the standard wrench size, SPIROL was able to machine the Nut out of commercially available raw material and standard tooling.

The customer collaborated with SPIROL on the production timing of the part such that SPIROL was able to manufacture the Nut with the custom M13 thread right after the production of the standard Panel Nut on the multi-spindle machine for a total cost savings of 95%!

9

APPLICATION ENGINEERINGIN PRACTICE

Machined Hex Nut in Wheel Chair

Application:A customer contacted SPIROL with an axle-alignment problem that they were having with a wheel chair. The application was a solid axle passing through the center hub of a wheel. The axles are cambered, causing extra stress for nuts that are not square to the threaded bolt. The conventional stamped nut was causing deflection in the axle when tightened

due to the threads of the nut not being formed perpendicular to the faces of the nut. This deflection was causing poor tracking.

Solution: SPIROL’s solution was a Machined Hex Nut manufactured to

the same specifications, but machined in one step from raw material rather than stamped and then threaded. SPIROL’s manufacturing methods allow for precise control of the cutting tools responsible for the final geometry of the product. In this case, threads running perpendicular to the faces of the nut were a major performance requirement. To the astonishment of the customer, SPIROL provided a Precision Machined Hex Nut for a price comparable to the price they were paying for a lower-performance product.

Panel Nuts in Toggle Switch

With Conventional Stamped Nut

With Precision Machined Hex Nut

SPIROL Application Engineers will review your application needs and work with your design team to recommend the best solution. One way to start the process is to visit our Optimal Application Engineering portal at www.SPIROL.com.

Innovative fastening solutions.Lower assembly costs.

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Precision Machined Nuts

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Please refer to www.SPIROL.com for the most current specifications and standard offering. Printed materials may be out of date.