| Size (d) | M12 | M16 | M20 | M22 | M24 | M27 | M30 | M36 |
|---|---|---|---|---|---|---|---|---|
| Pitch | 1.75 | 2 | 2.5 | 2.5 | 3 | 3 | 3.5 | 4 |
| b | 23 | 28 | 33 | 34 | 39 | 41 | 44 | 52 |
| ds | 11.30-12.70 | 15.30-16.70 | 19.16-20.84 | 21.16-22.84 | 23.16-24.84 | 26.16-27.84 | 29.16-30.84 | 35.00-37.00 |
| e (min) | 23.91 | 29.56 | 35.03 | 39.55 | 45.20 | 50.85 | 55.37 | 66.44 |
| k (nom) | 8 | 10 | 13 | 14 | 15 | 17 | 19 | 23 |
| k | 7.55-8.45 | 9.25-10.75 | 12.10-13.90 | 13.10-14.90 | 14.10-15.90 | 16.10-17.90 | 17.95-20.05 | 21.95-24.05 |
| s | 21.16-22 | 26.16-27 | 31.00-32 | 35.00-36 | 40.00-41 | 45.00-46 | 49.00-50 | 58.80-60 |
Dimensions in millimetres
For use with BS EN 14399 High-strength structural bolting assemblies for preloading
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