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DIN 6921 Standard Dimensions for Hexagon flange bolts with or without knurled underhead heavy series

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Technical History and International Equivalents of DIN 6921

This norm has been cancelled
This norm has been replaced by DIN EN 1665

Hexagon head fasteners with flange

Dimensional Drawing and Technical Diagrams

1740_4017.jpg

Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 6921Withdrawn

Publication date : 06/1983
d thread size
P
b (l<=125)
 b (l>125<=200) b (l>200) ds min
c min
dk max.
 k max
e min.
 s nom=max
M 5
0.8
16
-
 - 4.82
1
11.8
 5.4
8.71
 8
M 6
1
18
-
 - 5.82
1.1
14.2
 6.6
10.95
 10
M 8
1.25
22
28
 - 7.78
1.2
18
 8.1
14.26
 13
M 10
1.5
26
32
 - 9.78
1.5
22.3
 9.2 16.5 15
M 12
1.75
30
36
 - 11.73
1.8
26.6
 11.5 17.62 16
M 14
2
34
40
 - 13.73
2.1
30.5
 12.8 19.86 18
M 16
2
38
44
 57 15.73
2.4
35
 14.4
23.15
 21
M 20
2.5
46
52
 65 19.67
3
43
 17.1
29.87
 27

DIN 6921 1983 - ≈ weigth, in kg x1000 pcs, (ρ=7,85 kg/dm3) - commercial items

d thread size
M5
M6
M8
M10
M12
M14
M16
nominal length l
10 3.22
12 3.46 6.94 13.76 24.04
16 3.94 7.62 15.01 26.01
20 4.42 8.30 16.25 27.97 44.35
25 5.25 9.16 17.8 30.42 47.9 66.96 83.82
30 6 10.5 19.36 32.88 51.46 71.83 90.37
35 6.74 11.58 21.77 35.33 55.02 76.71 96.92
40 7.48 12.65 23.68 39.18 58.57 81.58 103.47
45 8.23 13.73 25.6 42.2 64.2 86.46 110
50 8.97 14.8 27.52 45.21 68.54 94.27 116.6
55 9.71 15.88 29.44 48.23 72.87 100.19 126.7
60 10.46 16.96 31.36 51.24 77.21 106.11 134.5
65 11.2 18.03 33.27 54.25 81.55 112.04 142.3
70 11.94 19.11 35.19 57.27 85.89 117.96 150
75 12.68 20.18 37.11 60.28 90.23 123.88 158
80 13.43 21.26 39.03 63.29 94.56 129.81 166
85 22.34 40.95 66.31 98.9 135.73 173
90 23.41 42.87 69.32 103.24 141.65 181
95 24.49 44.78 72.35 107.58 147.58 189
100 25.57 46.7 75.35 111.91 153.5 197
110 81.38 120.59 165.35 212
120 87.4 129.26 177.19 228
130 92.76 137 187.78 242
140 145.68 199.63 257
150 211.47 273

Hex head flanged screws with knurled underhead

Sechskantschrauben mit Flansch mit Rändelschraube Unterkopf

Viti a testa esagonale flangiata zigrinata

Dimensions in mm
d thread size k h dk

s

 nr. of Teeth
M 5
 4.3 0.15 11.2 8 24
M 6
 5.5 0.17 14.2 10 24
M 8
 7 0.2 18.2 13 24
M 10
 7.9 0.25 21 15 24
M 12
 8.7 0.25 24 17 24
M 16
 11.2 0.28 31 22 24

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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