DIN 7983

Countersunk head tapping screws

With Philips cross recess H
Type C = with cone end

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Screw Thread ST2.2 ST2.9 ST3.5 (ST3.9)
P Pitch 0.8 1.1 1.3 1.3
a max 0.8 1.1 1.3 1.3
dk max=nominal size 4.3 5.5 6.8 7.5
min 4 5.2 6.44 7.14
f ≈ 0.7 0.9 1.2 1.3
k ≈ 1.3 1.7 2.1 2.3
y Type C 2 2.6 3.2 3.5
Type F 1.6 2.1 2.5 2.7
Socket No. 1 1 2 2
M1 ≈ 2.8 3.4 4.6 4.7
M2 ≈ 2.4 3.1 4.3 4.4

Screw Thread ST4.2 ST4.8 ST5.5 ST6.3
P Pitch 1.4 1.6 1.8 1.8
a max 1.4 1.6 1.8 1.8
dk max=nominal size 8.1 9.5 10.8 12.4
min 7.74 9.14 10.37 11.97
f ≈ 1.4 1.5 1.7 2
k ≈ 2.5 3 3.4 3.8
y Type C 3.7 4.3 5 6
Type F 2.8 3.2 3.6 3.6
Socket No. 2 2 3 3
M1 ≈ 4.9 5.4 7 7.4
M2 ≈ 4.6 5.1 6.6 7.1



*dimension not ISO standardized, values from DIN 7983


All information is strictly informative