DIN 966

Cross recessed raised countersunk (oval) head screws

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Thread Size
d		 M1.6 M2 M2.5 M3
P Pitch 0.35 0.4 0.45 0.5
a max 0.7 0.8 0.9 1
dk max=nominal size 3 3.8 4.7 5.6
min 2.75 3.5 4.4 5.3
f ≈ 0.4 0.5 0.6 0.75
k max 0.96 1.2 1.5 1.65
r max 0.4 0.5 0.7 0.8
R ≈ 3 4 5 6
x max 0.9 1 1.1 1.25
Socket No. 0 1 1 1
M1 ≈ 1.9 2.5 2.7 3.1
M2 ≈ 1.8 2.4 2.8 3.1
Length of Thread b 15 16 18 19

Thread Size
d		 (M3.5) M4 M5
P Pitch 0.6 0.7 0.8
a max 1.2 1.4 1.6
dk max=nominal size 6.5 7.5 9.2
min 6.14 7.14 8.84
f ≈ 0.9 1 1.25
k max 1.93 2.2 2.5
r max 0.95 1 1.3
R ≈ 7 8 10
x max 1.5 1.75 2
Socket No. 2 2 2
M1 ≈ 4.2 4.5 5.3
M2 ≈ 4.3 4.6 5.3
Length of Thread b 20 22 25

Thread Size
d		 M6 M8 M10
P Pitch 1 1.25 1.5
a max 2 2.5 3
dk max=nominal size 11 14.5 18
min 10.57 14.07 17.57
f ≈ 1.5 2 2.5
k max 3 4 5
r max 1.6 2 2.5
R ≈ 12 16 20
x max 2.5 3.2 3.8
Socket No. 3 4 4
M1 ≈ 6.8 9 10
M2 ≈ 7 8.8 9.9
Length of Thread b 28 34 40



All information is strictly informative