Selected sizes used for CE (UKCA) Marking under BS EN 14399
| Size (d) | M12 | M16 | M20 | M22 | M24 | M27 | M30 | M36 |
|---|---|---|---|---|---|---|---|---|
| d1 | 13-13.27 | 17-17.27 | 21-21.33 | 23-23.33 | 25-25.33 | 28-28.52 | 31-31.62 | 37-37.62 |
| d2 | 23.48-24 | 29.48-30 | 36.38-37 | 38.38-39 | 43.38-44 | 49.00-50 | 54.80-56 | 64.80-66 |
| h (nom.) | 3 | 4 | 4 | 4 | 4 | 5 | 5 | 6 |
| h | 2.7-3.3 | 3.7-4.3 | 3.7-4.3 | 3.7-4.3 | 3.7-4.3 | 4.4-5.6 | 4.4-5.6 | 5.4-6.6 |
| e | 0.5-1.0 | 0.75-1.5 | 0.75-1.5 | 0.75-1.5 | 0.75-1.5 | 1-2.0 | 1-2.0 | 1.25-2.5 |
| c | 1.6-1.9 | 1.6-1.9 | 2.0-2.5 | 2.0-2.5 | 2.0-2.5 | 2.5-3.0 | 2.5-3.0 | 2.5-3.0 |
Dimensions in millimetres
For use with BS EN 14399 High-strength structural bolting assemblies for preloading
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