GroupstandardVW60212

Issue2017-09

Class.No.:61131

Descriptors:hexalobularsocket,bolt,flatheadbolt,fastener

HexalobularSocketFlatHeadBolts

Previousissues

VW60212:1985-03,1991-07,2001-08,2009-03,2012-07,2012-11

Changes

ThefollowingchangeshavebeenmadetoVW60212:2012-11:

–

Table1

,dimensionk:MinimumdimensionforM3,M5,andM6changed

–

Table1

,dimensionr:Upperlimitdeviationchanged

–

Table1

,dimensiont:Minimumdimensiondefinedasnominalvalue

–

Table4

updated

–

Table4

:IdentificationrequirementextendedtoallboltswiththreadsizesM3andM4

–

Table5

:MinimumbreakingforcesforM3,M5,andM6changed;rowforM4removed

–Standardrevised.

1Scope

ThisVolkswagenstandard(VW)definesthepropertiesofhexalobularsocketflatheadboltsmadeofsteelwithapropertyclassof8.8,aswellasstainlesssteeltypeA2withapropertyclassof70,inproductgradeA,withstandardmetricscrewthreadsofM3toM6.

Thedesignofthecountersinkscorrespondsto

DINENISO15065

,andthedesignoftheheadscorrespondsto

DINEN27721

.

NOTE:Duetothelowresidualbasethickness,theboltsmadeofsteelwiththreadsizesM3,M5,andM6cannotbefullyloaded.SteelboltswithanM4standardmetricscrewthreadandallstain‐

lesssteelboltscanbefullyloaded.Wherepossible,theuseofovalheadboltsasperDINENISO14584

[1]

ispreferred.

Alwaysusethelatestversionofthisstandard.

Thiselectronicallygeneratedstandardisauthenticandvalidwithoutsignature.

TheEnglishtranslationisbelievedtobeaccurate.Incaseofdiscrepancies,theGermanversionisaloneauthoritativeandcontrolling.

Page1of7

Technicalresponsibility

EXDV/3Matthias

Jesser

Tel.:

+495361948810

TheStandardsdepartment

K-ILI/5Tim

Hofmann

K-ILI

Tel.:

+495361927995

UweWiesner

Allrightsreserved.NopartofthisdocumentmaybeprovidedtothirdpartiesorreproducedwithoutthepriorconsentofoneoftheVolkswagenGroup’sStandardsdepartments.

?VolkswagenAktiengesellschaftVWNORM-2016-08a

Page2

VW60212:2017-09

2Dimensions

Dimensionlettersandtheirdesignationsarespecifiedin

DINENISO225

.Fordimensions,see

figure1

,aswellas

table1

,

table2

,and

table3

.

Legend

1Flat,orrounded

2Hexalobularsocketprofileasper

VW01048

aReferencepointfortheheadheightkistheintersectionpointofthenominaldiameterd

andthelowerheadcontouroftheflathead;seealso

DINEN27721

.

Figure1–Hexalobularsocketflatheadbolt

Page3

VW60212:2017-09

Table1–Dimensions

Dimensionsinmillimeters

Dimensions

Thread

M3

M4

M5

M6

P

a)

0.5

0.7

0.8

1

Nominaldimen‐

a

sion=max.

min.

1.00

1.40

1.60

2.00

0.10

0.20

0.20

0.25

Theoreticalmax.

Nominaldimen‐

dk

sion=max.

min.

6.30

9.40

10.40

12.50

5.50

8.40

9.30

11.30

5.20

8.04

8.94

10.87

Nominaldimen‐

k

sion=max.

min.

1.70

2.70

2.70

3.30

1.54

2.45

2.55

3.05

max.

r

Nominaldimen‐sion=min.

0.30

0.40

0.40

0.45

0.10

0.20

0.20

0.25

Hexalobularsocket

Nominalsize

T10

T20

T25

T30

A

2.80

3.95

4.50

5.60

max.

t

Nominaldimen‐sion=min.

0.83

1.30

1.35

1.64

0.70

1.04

1.12

1.39

a)Leadofthethread

Table2–Nominallengthsandweights

Dimensionsinmm,weightsing

Property

Thread

M3

M4

M5

M6

Shortestnominalboltlengthl

4

5

6

8

Weightpermmintheareaoftheshanklength

0.044

0.078

0.124

0.177

Headweight

0.17

0.58

0.76

1.35

Nominallengthslasper

VW60361

4,5,6,8,10,12,16,20,25,30,etc.

Intermediatenominallengths:14,18,22,28,32,38,etc.

Theboltweightiscalculatedwiththespecifiedindividualweightsasfollows:

Boltweight=(boltnominallength-headheight)×weightpermmintheareaoftheshanklength+headweight

Page4

VW60212:2017-09

Fortolerancesforboltnominallengths,see

table3

.

Table3–Lengthtolerances

Dimensionsinmillimeters

Nominal>

lengthl≤

4

6

10

18

30

50

80

6

10

18

30

50

80

120

Tolerance

±0.24

±0.29

±0.35

±0.42

±0.50

±0.60

±0.70

3TechnicalSupplySpecifications

See

table4

.

Table4–TechnicalSupplySpecifications

DesignationChemical

Material

composition

Steel

Stainlesssteel

—

A2

a)

DINENISO898-1

DINENISO3506-1

Mechanicalpropertiespropertyclass

Standard

8.8

b)

70

DINENISO898-1

DINENISO3506-1

,

DIN267-13

Identification

Identifier

Standard

M3

c)

,M5,M6:08.8M4

c)

:8.8

M3

d)

,M4

d)

:A2-70,optionallyA27

M5,M6:A2-70

DINENISO898-1

DINENISO3506-1

,

DIN267-13

SurfacefinishCode

Standard

Ofl-b140,Ofl-r645,Ofl-r677

Ofl-a100andcoatedwithlubricant

TechnicalSupplySpecification

TL240

,

TL244

,

VW13750

a)

VW13750

a)

,

TL52132

Thread

VW11611

VW11610

Productgrade

Limitdeviations,

Standard

formandpositionaltoleran‐ces

A

VW60591-1

,

DIN267-2

Internaldrive

VW01048

Geometricspecifications

VW60361

Surfacecondition

Limitsforsurfaceflawsasper

DINEN26157-3

Qualityassurancesystem

DINENISO16426

appliesforacceptancetesting.

Generalrequirements

DINISO8992

a)Othersurfaceprotectiontypesarepermissiblefollowingconsultationwiththe

EXDV/3

"StandardandMulti-UseParts"department(costcenter1733).

b)Duetotheirheadgeometry,thesebolts(withthreadsizesM3,M5,andM6)mightsometimesnotachievetheminimumbreaking

forceforpropertyclass8.8asdefinedin

DINENISO898-1

.However,theymuststillfulfilltheremainingmaterialandpropertyre‐quirementsforpropertyclass8.8asper

DINENISO898-1

.Inaddition,boltsmustachievetheminimumbreakingforcespecifiedin

table5

,withoutbreaking,ifatestfixtureasper

DINENISO898-1

isused,wheretheheadmustbeaccommodatedinasuitable

ringwithconicalbearingsurface.Whentestingtofracture,thefracturemayoccurinthethreadarea,intheshank,inthehead,orinthetransitionfromheadtoshank.

c)Identificationrequirementsupplementaryto

DINENISO898-1

.

d)Identificationrequirementsupplementaryto

DINENISO3506-1

.

Page5VW60212:2017-09

Table5–Minimumbreakingforcesforhexalobularsocketflatheadbolts,inproperty

class8.8,withidentifier08.8,thatcannotbefullyloaded

Thread

Minimumbreakingforce

N

M3

3500

M5

10100

M6

13900

Page6

VW60212:2017-09

4Designation

Exampledesignationforahexalobularsocketflatheadboltthatcannotbefullyloaded,withanM5standardmetricscrewthread,nominallengthl=20mm,threadendshapeKasper

VW60424

,

propertyclass8.8,andsurfaceprotectiontyper645asper

VW13750

:

HexalobularsocketflatheadboltVW60212–M5×20–K–08.8–Ofl-r645

or

HexalobularsocketflatheadboltN10569401

1)

2)

Exampledesignationforahexalobularsocketflatheadboltthatcanbefullyloaded,withanM4standardmetricscrewthread,nominallengthl=20mm,threadendshapeKasper

VW60424

,propertyclass8.8,andsurfaceprotectiontyper677asper

VW13750

:

HexalobularsocketflatheadboltVW60212–M4×20–K–8.8–Ofl-r677

or

HexalobularsocketflatheadboltN10672901

1)

2)

VW60424

and

DIN962

applytothedesignationoftypesanddesignswithadditionalorderdata.

5Applicabledocuments

Thefollowingdocumentscitedinthisstandardarenecessarytoitsapplication.

SomeoftheciteddocumentsaretranslationsfromtheGermanoriginal.ThetranslationsofGer‐

mantermsinsuchdocumentsmaydifferfromthoseusedinthisstandard,resultinginterminologi‐calinconsistency.

StandardswhosetitlesaregiveninGermanmaybeavailableonlyinGerman.Editionsinotherlanguagesmaybeavailablefromtheinstitutionissuingthestandard.

TL240

Thin-LayerZincPhosphating;SurfaceProtectionRequirements

TL244

Zinc/NickelAlloyCoatings;SurfaceProtectionRequirements

TL52132

LubricantforThreadedFastenerswithElectrolyticallyAppliedCoatings

orMadeofStainlessSteel;Requirements

VW01048

DriveTypesforThreadedParts;HexalobularSocketProfile

VW11610

MetricISOThread;LimitDimensionsforMediumToleranceClass;Ex‐

ternalThreads6g/InternalThreads6H

VW11611

MetricISOThread;LimitDimensionswithProtectiveCoatingforMedium

ToleranceClass;ExternalThreads6gh/InternalThreads6H

VW13750

SurfaceProtectionforMetalParts;SurfaceProtectionTypes,Codes

VW60361

MechanicalFasteners;PartsReduction;GeneralGuidelines

VW60424

DesignationInformationforScrews,Bolts,Nuts,Washers,andRivets;

Shapes,TypesandAdditionalSpecifications

VW60591-1

TolerancesandLimitsofSizeforFasteners;Part1:Screws,Bolts,and

Studs

1)Indexforpropertyclassesandsurfacesasperstandard-partdrawingand/ormasterdatalist.

2)Forreleasedparts,seestandardpartsmanagementsystem(

NVS

).

Page7VW60212:2017-09

DIN267-13

Fasteners-Technicalspecifications-Part13:Partsforboltedconnec‐

tionswithspecificmechanicalpropertiesforuseattemperaturesrangingfrom-200°Cto+700°C

DIN267-2

Fasteners-Technicalspec