DIN 931

Hexagon head bolts with shank Partially Threaded

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Thread Size
d		 M1.6 M2 M2.5
P Thread Pitch 0.35 0.4 0.45
Length of Thread
b		 Ref. L≤125 9 10 11
125＜L≤200 - - -
L＞200 - - -
c min 0.1 0.1 0.1
max 0.25 0.25 0.25
da max 2 2.6 3.1
ds max=nominal size 1.6 2 2.5
min Grade A 1.46 1.86 2.36
Grade B - - -
dw min Grade A 2.4 3.2 4.1
Grade B - - -
e min Grade A 3.41 4.32 5.45
Grade B - - -
k Nominal Size 1.1 1.4 1.7
Grade A min 0.98 1.28 1.58
max 1.22 1.52 1.82
Grade B min - - -
max - - -
k1 min 0.7 0.9 1.1
r min 0.1 0.1 0.1
s max=nominal size 3.2 4 5
min Grade A 3.02 3.82 4.82
Grade B - - -

Thread Size
d		 M3 (M3.5) M4
P Thread Pitch 0.5 0.6 0.7
Length of Thread
b		 Ref. L≤125 12 13 14
125＜L≤200 - - -
L＞200 - - -
c min 0.15 0.15 0.15
max 0.4 0.4 0.4
da max 3.6 4.1 4.7
ds max=nominal size 3 3.5 4
min Grade A 2.86 3.32 3.82
Grade B - - -
dw min Grade A 4.6 5.1 5.9
Grade B - - -
e min Grade A 6.01 6.58 7.66
Grade B - - -
k Nominal Size 2 2.4 2.8
Grade A min 1.88 2.28 2.68
max 2.12 2.52 2.92
Grade B min - - -
max - - -
k1 min 1.3 1.6 1.9
r min 0.1 0.1 0.2
s max=nominal size 5.5 6 7
min Grade A 5.32 5.82 6.78
Grade B - - -

Thread Size
d		 M5 M6 (M7)
P Thread Pitch 0.8 1 1
Length of Thread
b		 Ref. L≤125 16 18 20
125＜L≤200 22 24 26
L＞200 - - -
c min 0.15 0.15 0.15
max 0.5 0.5 0.5
da max 5.7 6.8 7.8
ds max=nominal size 5 6 7
min Grade A 4.82 5.82 6.78
Grade B - - -
dw min Grade A 6.9 8.9 9.8
Grade B - - -
e min Grade A 8.79 11.05 12.12
Grade B - - -
k Nominal Size 3.5 4 4.8
Grade A min 3.35 3.85 4.65
max 3.65 4.15 4.95
Grade B min - - -
max - - -
k1 min 2.28 2.63 3.19
r min 0.2 0.25 0.25
s max=nominal size 8 10 11
min Grade A 7.78 9.78 10.73
Grade B - - -

Thread Size
d		 M8 M10 M12
P Thread Pitch 1.25 1.5 1.75
Length of Thread
b		 Ref. L≤125 22 26 30
125＜L≤200 28 32 36
L＞200 - 45 49
c min 0.15 0.15 0.15
max 0.6 0.6 0.6
da max 9.2 11.2 13.7
ds max=nominal size 8 10 12
min Grade A 7.78 9.78 11.73
Grade B - - -
dw min Grade A 11.6 15.6 17.4
Grade B - - -
e min Grade A 14.38 18.9 21.1
Grade B - - -
k Nominal Size 5.3 6.4 7.5
Grade A min 5.15 6.22 7.32
max 5.45 6.58 7.68
Grade B min - - -
max - - -
k1 min 3.54 4.28 5.05
r min 0.4 0.4 0.6
s max=nominal size 13 17 19
min Grade A 12.73 16.73 18.67
Grade B - - -

Thread Size
d		 (M14) M16 (M18)
P Thread Pitch 2 2 2.5
Length of Thread
b		 Ref. L≤125 34 38 42
125＜L≤200 40 44 48
L＞200 53 57 61
c min 0.15 0.2 0.2
max 0.6 0.8 0.8
da max 15.7 17.7 20.2
ds max=nominal size 14 16 18
min Grade A 13.73 15.73 17.73
Grade B - 15.57 17.57
dw min Grade A 20.5 22.5 25.3
Grade B - 22 24.8
e min Grade A 24.49 26.75 30.14
Grade B - 26.17 29.56
k Nominal Size 8.8 10 11.5
Grade A min 8.62 9.82 11.28
max 8.98 10.18 11.72
Grade B min - 9.71 11.15
max - 10.29 11.85
k1 min 5.96 6.8 7.8
r min 0.6 0.6 0.6
s max=nominal size 22 24 27
min Grade A 21.67 23.67 26.67
Grade B - 23.16 26.16

Thread Size
d		 M20 (M22) M24
P Thread Pitch 2.5 2.5 3
Length of Thread
b		 Ref. L≤125 46 50 54
125＜L≤200 52 56 60
L＞200 65 69 73
c min 0.2 0.2 0.2
max 0.8 0.8 0.8
da max 22.4 24.4 26.4
ds max=nominal size 20 22 24
min Grade A 19.67 21.67 23.67
Grade B 19.48 21.48 23.48
dw min Grade A 28.2 30 33.6
Grade B 27.7 29.5 33.2
e min Grade A 33.53 35.72 39.98
Grade B 32.95 35.03 39.55
k Nominal Size 12.5 14 15
Grade A min 12.28 13.78 14.78
max 12.72 14.22 15.22
Grade B min 12.15 13.65 14.65
max 12.85 14.35 15.35
k1 min 8.5 9.6 10.3
r min 0.8 0.8 0.8
s max=nominal size 30 32 36
min Grade A 29.67 31.61 35.38
Grade B 29.16 31 35

Thread Size
d		 (M27) M30 (M33)
P Thread Pitch 3 3.5 3.5
Length of Thread
b		 Ref. L≤125 60 66 72
125＜L≤200 66 72 78
L＞200 79 85 91
c min 0.2 0.2 0.2
max 0.8 0.8 0.8
da max 30.4 33.4 36.4
ds max=nominal size 27 30 33
min Grade A - - -
Grade B 26.48 29.48 32.38
dw min Grade A - - -
Grade B 38 42.7 46.6
e min Grade A - - -
Grade B 45.2 50.85 55.37
k Nominal Size 17 18.7 21
Grade A min - - -
max - - -
Grade B min 16.65 18.28 20.58
max 17.35 19.12 21.42
k1 min 11.7 12.8 14.4
r min 1 1 1
s max=nominal size 41 46 50
min Grade A - - -
Grade B 40 45 49

Thread Size
d		 M36 (M39)
P Thread Pitch 4 4
Length of Thread
b		 Ref. L≤125 78 84
125＜L≤200 84 90
L＞200 97 103
c min 0.2 0.3
max 0.8 1
da max 39.4 42.4
ds max=nominal size 36 39
min Grade A - -
Grade B 35.38 38.38
dw min Grade A - -
Grade B 51.1 55.9
e min Grade A - -
Grade B 60.79 66.44
k Nominal Size 22.5 25
Grade A min - -
max - -
Grade B min 22.08 24.58
max 22.92 25.42
k1 min 15.5 17.2
r min 1 1
s max=nominal size 55 60
min Grade A - -
Grade B 53.8 58.8



b measurement varies according to length of bolt
b1 for L ≤ 125 mm
b2 for 125mm < L ≤ 200 mm
b3 for L > 200 mm


All information is strictly informative