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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 10.9
| Washer size |
Bolt size |
Pitch [mm] |
Oil GF=0,71 µg=0,13 µw=0,14 |
GTP600 GF=0,75 µg=0,08 µw=0,13 | ||
|---|---|---|---|---|---|---|
| Torque [Nm] |
Clamp load [kN] |
Torque [Nm] |
Clamp load [kN] | |||
| NL3 | M3 | 0,5 | 1,8 | 3,2 | 1,6 | 3,4 |
| NL4 | M4 | 0,7 | 4,1 | 5,6 | 3,6 | 5,9 |
| NL5 | M5 | 0,8 | 8,1 | 9,1 | 7,0 | 9,6 |
| NL6 | M6 | 1,0 | 14,1 | 12,9 | 12,3 | 13,6 |
| NL8 | M8 | 1,25 | 34 | 23 | 30 | 25 |
| NL10 | M10 | 1,5 | 67 | 37 | 58 | 39 |
| NL12 | M12 | 1,75 | 115 | 54 | 99 | 57 |
| NL14 | M14 | 2,0 | 183 | 74 | 158 | 78 |
| NL16 | M16 | 2,0 | 279 | 100 | 240 | 106 |
| NL18 | M18 | 2,5 | 391 | 123 | 337 | 130 |
| NL20 | M20 | 2,5 | 547 | 157 | 470 | 165 |
| NL22 | M22 | 2,5 | 745 | 194 | 639 | 205 |
| NL24 | M24 | 3,0 | 942 | 225 | 809 | 238 |
| NL27 | M27 | 3,0 | 1375 | 294 | 1176 | 310 |
| NL30 | M30 | 3,5 | 1875 | 358 | 1608 | 378 |
| NL33 | M33 | 3,5 | 2526 | 443 | 2157 | 468 |
| NL36 | M36 | 4,0 | 3259 | 522 | 2788 | 551 |
| NL39 | M39 | 4,0 | 4203 | 624 | 3588 | 659 |
| NL42 | M42 | 4,5 | 5202 | 716 | 4445 | 757 |
Phones: (800) 638-1830 or (410) 358-3130 are available Monday-Friday 8:30 AM to 5:30 PM Eastern time.
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