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DIN 404 Standard Dimensions for Slotted capstan screws

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Slotted capstan screws

This standard DIN 404 specifies dimensions and technical delivery conditions for M2 to M10 slotted capstan screws. These screws may be used both as fastening and adlusting screws. They are primarily designed for use in electrical engineering and may be tightened by means of a sliding tee bar where it is not possible to use a screwdriver. Locking wires are often attached to the cross holes for securing purposes.

Dimensional Drawing and Technical Diagrams

72_P1Sgp4_DIn-404.jpg

Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 404
Publication date: 08/2006 - Supersedes DIN 404: 09/1986

d thread size

 P b k nom d1 max=nom n nom t min/max w nom d2 min=nom
M 2 0.4 16 3 3.8 0.5 0.7 09 1.2 1.2
M 2.5 0.45 18 3.5 4.5 0.6 0.8 1 1.2 1.2
M 3 0.5 19 4 5.5 0.8 1 1.25 1.5 1.5
M 4 0.7 22 5 7 1 1.4 1.7 2 2
M 5 0.8 25 6.5 8.5 1.2 1.7 2 2.5 2.5
M 6 1 28 8 10 1.6 2.2 2.6 3 3
M 8 1.25 34 10 13 2 2.7 3.2 4 4
M 10 1.5 40 12.5 16 2.5 3.5 4.1 5 5

DIN 404 - Approximate mass, in kg x1000 pcs, (ρ=7,85 kg/dm3) - commercial items
d thread size
M2
M2.5
M3
M3.5
M4
M5
M6

M8
M10
nominal length l
3 0.24 0.4
4 0.26 0.43 0.68
5 0.28 0.46 0.72 0.99 1.41
6 0.3 0.49 0.77 1.05 1.49 3.09
8 0.35 0.55 0.86 1.16 1.64 3.33 4.79
10 0.4 0.61 0.95 1.28 1.79 3.58 5.14 10.3
12 0.45 0.67 1.05 1.4 1.94 3.82 5.49 10.9 19.3
14 0.5 0.73 1.16 1.54 2.1 4.06 5.84 11.5 20.5
16 0.55 0.79 1.27 1.68 2.28 4.3 6.2 12.1 21.3
18 0.6 0.85 1.38 1.84 2.48 4.6 6.55 12.7 22.3
20 0.91 1.5 2.02 2.7 4.85 6.9 13.3 23.2
22 0.97 1.62 2.18 2.93 5.1 7.25 14 24.2
25 1.06 1.78 2.4 3.23 5.6 7.8 15.2 25.7
28 1.95 2.62 3.52 6.1 8.4 16.4 27.2
30 2.06 2.77 3.72 6.4 8.9 17.2 28.2
35 3.15 4.21 7.2 10.1 19.2 31.3
40 4.71 8 11.2 21.1 34.4
45 8.8 12.3 23.1 37.5
50 9.6 13.4 25.1 41.1
55 27.1 44.2
60 47.3

Reproduced by permission of DIN Deutsches Institut für Normung e. V. The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from Beuth Verlag GmbH, Burggrafenstraße 6, 10787 Berlin, Germany.
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