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DIN 34821 Standard Dimensions for 12 point socket cheese head screws

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This standard specifies dimensions and technical delivery conditions for M6 to M16 and M12 x 1,5 to M16 x 1,5 cheese head screws with 12 point socket, of property classes 8.8, 10.9 and A2-70, and product grade A.

Dimensional Drawing and Technical Diagrams

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Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 34821
Publication date: 11/2005
d thread size
 M 6 M 8 M 10 M 12 M 14 M 16
P coarse 1 1.25 1.5 1.75 2 2
P fine - - - 1.5 1.5 1.5
dk mx 10 13 16 18 21 24
dk min 9.78 12.73 15.73 17.73 20.67 23.67
k nom=max 6 8 10 12 14 16
h max 4.2 5.48 6.78 8.08 9.48 10.58
12 point socket
 size N8 N10 N12 N14 N16 N18
s 7.4 9.84 11.7 13.54 15.99 17.18
t min 3 4 5 6 7 8

Din 34821 - ≈ weight in kg x1000 pcs, (ρ=7,85 kg/dm3) - commercial sizes
d thread size M 6 M 8 M 10 M 12 M 14 M 16
nominal length l
8
10
12 4.9
16 5.6 11.2
20 6.3 12.4 21.8 32.6 48.9 71.3
25 7.1 14 24.2 36.2 54 78.1
30 8 15.6 26.7 40 59.1 85
35 8.9 17.1 29.1 43.6 64.2 91.8
40 9.7 18.7 31.6 47.3 69.4 98.7
45 10.6 20.2 34 51 74.5 106
50 11.4 21.8 36.5 54.6 79.6 112
55 12.3 23.3 38.9 58.3 84.8 119
60 13.2 24.9 41.3 61.9 89.9 126
65 14 26.4 43.8 65.6 95 133
70 14.9 28 46.2 69.3 100 140
80 31.1 51.1 76.6 110 153
90 50 83.9 121 167
100 131 181

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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