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Torque guidelines [Nm]
Recommended torque figures below are based on tests in our own lab with calibrated torque transmitters and load cells.
GF = ratio of yield point
µg = thread friction
µw = washer
friction
GTP600 = graphite lubricant
NORD-LOCK zinc flake coated (Delta Protekt®)
washers with
non-plated bolt 12.9
| Washer size |
Bolt size |
Pitch [mm] |
Oil GF=0,71 µg=0,13 µw=0,12 |
GTP600 GF=0,75 µg=0,08 µw=0,11 | ||
|---|---|---|---|---|---|---|
| Torque [Nm] |
Clamp load [kN] |
Torque [Nm] |
Clamp load [kN] | |||
| NL3 | M3 | 0,5 | 2,0 | 3,9 | 1,7 | 4,1 |
| NL4 | M4 | 0,7 | 4,6 | 6,7 | 4,0 | 7,1 |
| NL5 | M5 | 0,8 | 9,1 | 10,9 | 7,7 | 11,5 |
| NL6 | M6 | 1,0 | 15,8 | 15,4 | 13,5 | 16,3 |
| NL8 | M8 | 1,25 | 38 | 28 | 32 | 30 |
| NL10 | M10 | 1,5 | 75 | 44 | 64 | 47 |
| NL12 | M12 | 1,75 | 128 | 65 | 109 | 68 |
| NL14 | M14 | 2,0 | 204 | 89 | 174 | 94 |
| NL16 | M16 | 2,0 | 311 | 120 | 263 | 127 |
| NL18 | M18 | 2,5 | 437 | 148 | 370 | 156 |
| NL20 | M20 | 2,5 | 610 | 188 | 515 | 198 |
| NL22 | M22 | 2,5 | 831 | 233 | 699 | 246 |
| NL24 | M24 | 3,0 | 1052 | 270 | 887 | 286 |
| NL27 | M27 | 3,0 | 1533 | 352 | 1288 | 372 |
| NL30 | M30 | 3,5 | 2091 | 430 | 1761 | 454 |
| NL33 | M33 | 3,5 | 2815 | 532 | 2362 | 562 |
| NL36 | M36 | 4,0 | 3633 | 626 | 3053 | 662 |
| NL39 | M39 | 4,0 | 4683 | 748 | 3925 | 790 |
| NL42 | M42 | 4,5 | 5799 | 860 | 4866 | 908 |
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