DIN 963

Slotted countersunk (flat) head screws

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Thread Size
d		 M1 M1.2 M1.4
P Pitch 0.25 0.25 0.3
a max 0.5 0.5 0.6
dk max=nominal size 1.9 2.3 2.6
min 1.76 2.06 2.46
k max 0.6 0.72 0.84
n max 0.45 0.5 0.5
min 0.31 0.36 0.36
r max 0.1 0.12 0.14
t max 0.3 0.35 0.4
min 0.2 0.25 0.28
x max - - -
Length of Thread b 1) 1) 1)
1)only with thread up to the head

Thread Size
d		 M1.6 M2 M2.5
P Pitch 0.35 0.4 0.45
a max 0.7 0.8 0.9
dk max=nominal size 3 3.8 4.7
min 2.86 3.5 4.4
k max 0.96 1.2 1.5
n max 0.6 0.7 0.8
min 0.46 0.56 0.66
r max 0.16 0.2 0.25
t max 0.45 0.6 0.7
min 0.32 0.4 0.5
x max 0.9 1 1.1
Length of Thread b 15 16 18

Thread Size
d		 M3 (M3.5) M4
P Pitch 0.5 0.6 0.7
a max 1 1.2 1.4
dk max=nominal size 5.6 6.5 7.5
min 5.3 6.14 7.14
k max 1.65 1.93 2.2
n max 1 1 1.2
min 0.86 0.86 1.06
r max 0.3 0.35 0.4
t max 0.85 1 1.1
min 0.6 0.7 0.8
x max 1.25 1.5 1.75
Length of Thread b 19 20 22

Thread Size
d		 M5 M6 M8
P Pitch 0.8 1 1.25
a max 1.6 2 2.5
dk max=nominal size 9.2 11 14.5
min 8.84 10.57 14.07
k max 2.5 3 4
n max 1.51 1.91 2.31
min 1.26 1.66 2.06
r max 0.5 0.6 0.8
t max 1.3 1.6 2.1
min 1 1.2 1.6
x max 2 2.5 3.2
Length of Thread b 25 28 34

Thread Size
d		 M10 M12 (M14)
P Pitch 1.5 1.75 2
a max 3 3.5 4
dk max=nominal size 18 22 25
min 17.57 21.48 24.48
k max 5 6 7
n max 2.81 3.31 3.31
min 2.56 3.06 3.06
r max 1 1.2 1.4
t max 2.6 3 3.5
min 2 2.4 2.8
x max 3.8 4.4 5
Length of Thread b 40 46 52

Thread Size
d		 M16 (M18) M20
P Pitch 2 2.5 2.5
a max 4 5 5
dk max=nominal size 29 33 36
min 28.48 32.38 35.38
k max 8 9 10
n max 4.37 4.37 5.37
min 4.07 4.07 5.07
r max 1.6 1.8 2
t max 4 4.5 5
min 3.2 3.6 4
x max 5 6.3 6.3
Length of Thread b 58 64 70



All information is strictly informative