Execution standard reference

M6 x 40 Mushroom head square neck bolts — DIN 603 / ISO 8677 / ISO 8678

M6 x 40 is listed in the confirmed supply specifications of the products shown below. Dimensions are referenced against DIN 603 / ISO 8677 / ISO 8678; where these standards differ, both values are shown so the correct one can be confirmed before ordering. Packing quantity, stock status and mechanical property class are confirmed in the quotation. Column symbols: P = thread pitch.

Mushroom head square neck boltsCurrent standardVerified dimensional data

Dimensional reference

Shows dimensions already stored in the standard library. Missing values are not filled automatically.

standardStandard	statusStatus	PPitch · mm	bodyDiameterMaxbodyDiameterMax (mm)	bodyDiameterMinbodyDiameterMin (mm)	neckWidthMaxneckWidthMax (mm)	neckWidthMinneckWidthMin (mm)	neckHeightMaxneckHeightMax (mm)	neckHeightMinneckHeightMin (mm)	headDiameterMaxheadDiameterMax (mm)	headDiameterMinheadDiameterMin (mm)	headHeightMaxheadHeightMax (mm)	headHeightMinheadHeightMin (mm)	threadLengththreadLength (mm)	bL ≤ 125 · mm	b125 < L ≤ 200 · mm	bL > 200 · mm	cornerDistancecornerDistance (mm)	rMaxrMax (mm)	cMaxcMax (mm)	cMincMin (mm)	bearingDiameterMinbearingDiameterMin (mm)
DIN 603	Current	1	6	5.52	6.48	5.52	4.6	3.4	16.55	15.45	3.88	3.12	-	18	24	37	-	-	-	-	-
ISO 8677	Historical	1	6.48	-	6.48	5.52	4.6	3.4	16	14.9	3.6	3	-	18	24	-	7.2	0.5	-	-	-
ISO 8678	Current	1	6	-	6.48	5.88	3	2.4	14.2	-	3.6	3	-	18	-	-	7.64	0.5	1.9	1.1	12.2

standardDIN 603

statusCurrent

P · mm1

bodyDiameterMax6

More dimensions

bodyDiameterMin5.52

neckWidthMax6.48

neckWidthMin5.52

neckHeightMax4.6

neckHeightMin3.4

headDiameterMax16.55

headDiameterMin15.45

headHeightMax3.88

headHeightMin3.12

threadLength-

b · mm18

b · mm24

b · mm37

cornerDistance-

rMax-

cMax-

cMin-

bearingDiameterMin-

standardISO 8677

statusHistorical

P · mm1

bodyDiameterMax6.48

More dimensions

bodyDiameterMin-

neckWidthMax6.48

neckWidthMin5.52

neckHeightMax4.6

neckHeightMin3.4

headDiameterMax16

headDiameterMin14.9

headHeightMax3.6

headHeightMin3

threadLength-

b · mm18

b · mm24

b · mm-

cornerDistance7.2

rMax0.5

cMax-

cMin-

bearingDiameterMin-

standardISO 8678

statusCurrent

P · mm1

bodyDiameterMax6

More dimensions

bodyDiameterMin-

neckWidthMax6.48

neckWidthMin5.88

neckHeightMax3

neckHeightMin2.4

headDiameterMax14.2

headDiameterMin-

headHeightMax3.6

headHeightMin3

threadLength-

b · mm18

b · mm-

cornerDistance7.64

rMax0.5

cMax1.9

cMin1.1

bearingDiameterMin12.2

Verified differences from related standards

Only dimensions present in complete, verified standard data are listed. Related standards are not automatically interchangeable.

Size	Dimension	Compared values
M6	dₛ	DIN 603 6 / ISO 8677 6.48
M6	dk	DIN 603 16.55 / ISO 8677 16
M6	dk	DIN 603 15.45 / ISO 8677 14.9
M6	k	DIN 603 3.88 / ISO 8677 3.6
M6	k	DIN 603 3.12 / ISO 8677 3
M6	v	DIN 603 5.52 / ISO 8678 5.88
M6	f	DIN 603 4.6 / ISO 8678 3
M6	f	DIN 603 3.4 / ISO 8678 2.4
M6	dk	DIN 603 16.55 / ISO 8678 14.2
M6	k	DIN 603 3.88 / ISO 8678 3.6
M6	k	DIN 603 3.12 / ISO 8678 3

Available products

Mushroom Head Square Neck Bolts

Carbon Steel, Stainless Steel

Special-Form Bolt

Stainless Steel, Carbon Steel

Quote against the correct standard.

Include sizes, material, finish, quantity and required documents.

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