Engineering Tools
Reference data for specifying and sourcing fasteners correctly — the numbers a procurement or design engineer actually needs.
Proof loads
The clamp load a fastener is rated to hold (kN) — same As × Sp basis as the torque chart, so the two are directly consistent.
| Size | Grade 8.8 | Grade 10.9 | Grade 12.9 |
|---|---|---|---|
| M6 | 12.06 kN | 16.68 kN | 19.5 kN |
| M8 | 21.96 kN | 30.38 kN | 35.5 kN |
| M10 | 34.8 kN | 48.14 kN | 56.26 kN |
| M12 | 50.58 kN | 69.97 kN | 81.77 kN |
| M16 | 94.2 kN | 130.31 kN | 152.29 kN |
| M20 | 147.0 kN | 203.35 kN | 237.65 kN |