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DIN EN ISO 14579 Standard Dimensions for Hexalobular socket head screws

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Technical History and International Equivalents of DIN EN ISO 14579

Equivalent standards: UNI EN ISO 14579 ISO 14579 NF EN ISO 14579 BS EN ISO 14579

Hexalobular socket head cap screws

This international standard specifies the characteristics of hexalobular socket head cap screws with thread sizes from M2 up to M20 enclosed, of product grade A.

Dimensional Drawing and Technical Diagrams

1435_4269.jpg

Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 14579
Publication date : 06/2011 Supersedes DIN 14579: 05/2002
d thread size Pitch b dk max plain head dk max knurled head k max w min Hexalobular socket
Socket Nr A t min t max
M 2 0.4 16 3.8 3.98 2 0.55 6 1.75 0.71 0.84
M 2.5 0.45 17 4.5 4.68 2.5 0.85 8 2.4 0.91 1.04
M 3 0.5 18 5.5 5.68 3 1.15 10 2.8 1.01 1.27
M 4 0.7 20 7 7.22 4 1.4 20 3.95 1.42 1.8
M 5 0.8 22 8.5 8.72 5 1.9 25 4.5 1.65 2.03
M 6 1 24 10 10.22 6 2.3 30 5.6 2.02 2.42
M 8 1.25 28 13 13.27 8 3.3 45 7.95 2.92 3.31
M 10 1.5 32 16 16.27 10 4 50 8.95 3.62 4.02
M 12 1.75 36 18 18.27 12 4.8 55 11.35 4.82 5.21
M 14 2 40 21 21.33 14 5.8 60 13.45 5.62 5.99
M 16 2 44 24 24.33 16 6.8 70 15.7 6.62 7.01
M 18 2.5 48 27 27.33 18 7.8 80 17.75 7.5 8
M 20 2.5 52 30 30.33 20 8.6 90 20.2 8.69 9.20

DIN 14579 - ≈ mass in kg x1000 pcs, (ρ=7,85 kg/dm3) - commercial items
d thread size M 2 M 2.5 M 3 M 4 M 5 M 6 M 8 M 10 M 12 M 14 M 16 M 18 M 20
nominal length l
3 0.155
4 0.175 0.345
5 0.195 0.375 0.67
6 0.215 0.405 0.71 1.5 2.20
8 0.255 0.465 0.79 1.65 2.45 4.33
10 0.295 0.525 0.88 1.8 2.7 4.7 10.3 17.9
12 0.355 0.585 0.96 1.95 2.95 5.07 10.9 18.9
14 3.20 5.46 11.5 19.9
16 0.415 0.705 1.16

2.25

 3.45 5.7 12.1 20.9 29.2
18 3.70 6.14 12.7 21.9 30.6
20 0.495 0.825 1.36 2.65 4.01 6.53 13.4 22.9 32.1 43 64.7
22 1.46 2.8 4.25 6.92 14 23.9 33.5 45 67.3
25 0.975 1.61 3.15 4.78 7.59 15 25.4 35.7 48 71.3
30 1.86 3.65 5.55 8.3 16.9 27.9 39.3 53 77.8 111 128
35 2.11 4.15 6.32 9.91 18.9 30.4 42.9 58 84.4 120 139
40 2.33 4.65 7.09 11 20.9 32.9 46.5 63 91 129 150
45 5.15 7.86 12.1 22.9 36.1 50.1 68 97.6 138 161
50 5.65 8.63 13.2 24.9 39.3 54.5 73 106 147 172
55 6.15 9.4 14.3 26.9 42.5 58.9 78 114 156 183
60 6.65 10.17 15.4 28.9 45.7 63.4 84 122 165 194
65 10.94 16.5 31 48.9 67.8 90 130 174 205
70 11.71 17.6 33 52.1 71.3 96 138 183 216
75 12.48 18.7 35 55.3 75.7 102 146 193 228
80 13.25 19.8 37 58.5 80.2 108 154 203 241
85 14.02 20.9 39 61.7 84.6 114 162 213 253
90 14.79 22 41 64.9 89.1 120 170 223 266
95 23.1 43 68.1 93.5 126 178 233 278
100 15.56 24.2 45 71.2 98 132 186 243 291
110 16.33 26.4 49 77.6 107 144 202 263 316
120 28.6 53 84 116 156 218 283 341
130 90.4 125 168 234 303 366
140 96.8 134 182 250 323 391
150 103.2 143 192 266 343 416
160 109.6 152 204 282 363 441
180 403 491
200 541

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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