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DIN 7969 Standard Dimensions for --

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This standard specifies dimensions and technical delivery conditions for M12 to M24 slotted countersunk head bolts of product grade C for use in structural steel bolting. It also specifies the nuts and the washers to be used. Countersunk head bolts complying with this standard are suitable for use in aluminium structures and in composite construction.

Dimensional Drawing and Technical Diagrams

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Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 7969

Publication date: 10/2007
d thread size
P
 α
a
b
dk nom=max
k nom
n nom
 t min
M 12
1.75
 75° +5°-0
16
22
28
12
 7 3 4
M 16
2
 75° +5°-0
22
28
35
16
 9 4 4
M 20
2.5
 60° +5°-0
25
32
40
20
 11.5 5 4
M 24
3
 60° +5°-0
29
38
50
24
 13 5 6

DIN 7969 - ≈ weigth of bolt+nut in kg x1000 pcs, (ρ=7,85 kg/dm3) - commercial items
d thread size M 12 M 16 M 20 M 24
nominal length l
35 46.2
40 51.6
45 56 111
50 60.5 119 194
55 64.9 127 209
60 69.4 135 221 336
65 72.8 143 234 354
70 77.2 151 246 372
75 81.7 159 258 389
80 86.1 167 271 407
90 95 181 292 436
100 104 196 317 471
110 113 212 342 506
120 122 228 366 543
130 131 244 390 578
140 140 259 415 614
150 149 275 440 649
160 158 291 465 685
≈ weigth of nut in kg x1000 pcs 15.3 36.5 69.3 119

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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