This standard DIN 653 specifies dimensions and technical delivery conditions for M1 to M10 knurled thumb screws, low type.

Dimensional Drawing and Technical Diagrams

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Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 653

Publication Date 08 - 2006 - Supersedes DIN 653: 09 - 1986
d thread size M 1 M 1.2 M 1.4 M 1.6 M 2 M 2.5 M 3 M 4 M 5 M 6 M 8 M 10
P 0.25 0.25 0.3 0.35 0.4 0.45 0.5 0.7 0.8 1 1.25 1.5
a1 max. 0.75 0.75 0.9 1.05 1.2 1.35 1.5 2.1 2.4 3 3.75 4.5
dk nom 5.5 6 7 7.5 9 11 12 16 20 24 30 36
ds min - - - - 1.86 2.36 2.86 3.82 4.82 5.82 7.78 9.78
e - - - - 1.5 2 2 3 3 4 5 6
k max=nom 1.5 1.5 2 2 2 2.5 2.5 3.5 4 5 6 8
r 0.5 00.5 0.5 0.5 0.5 0.5 0.5 0.5 1 1 2 2

DIN 653 2006 -Approximate mass, in kg x1000 pcs, (ρ=7,85 kg/dm3) - commercia items

d thread size M1 M1.2 M1.4
M1.6
M2
M2.5
M3
M4
M5

M6

M8
M10
nominal length l
2 0.228 0.347
3 0.293 0.353 0.632 0.78
4 0.297 0.36 0.641 0.792 1.07
5 0.301 0.366 0.65 0.804 1.09 1.95
6 0.305 0.373 0.659 0.816 1.11 1.98 2.47
8 0.383 0.676 0.84 1.14 2.04 2.56 6.1
10 0.694 0.864 1.18 2.1 2.64 6.25 11.1
12 0.886 1.22 2.16 2.73 6.4 11.3 19.8
14 1.25 2.22 2.82 6.55 11.5 20.1
16 1.28 2.28 2.91 6.7 11.7 20.4 39
18 2.34 3 6.85 11.9 20.7 39.6
20 3.1 7 12.1 21 40.2 73.5
22 7.15 12.3 21.3 40.8 74.5
25 7.37 12.6 21.8 41.7 76
28 12.9 22.3 42.6 77.5
30 13.2 22.6 43.2 78.4
32 43.8 79.8
35 44.4 80.9
38 82.8
40 83.4