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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 stainless steel with stainless steel bolt, A4
| Washer size |
Bolt size |
Pitch [mm] |
A4-70, GTP600 GF=0,65 µg=0,14 µw=0,15 |
A4-80, GTP600 GF=0,65 µg=0,14 µw=0,15 | ||
|---|---|---|---|---|---|---|
| Torque [Nm] |
Clamp load [kN] |
Torque [Nm] |
Clamp load [kN] | |||
| NL3 | M3 | 0,5 | 0,9 | 1,5 | 1,2 | 2,0 |
| NL4 | M4 | 0,7 | 2,0 | 2,6 | 2,7 | 3,4 |
| NL5 | M5 | 0,8 | 3,9 | 4,1 | 5,3 | 5,5 |
| NL6 | M6 | 1,0 | 6,9 | 5,9 | 9,2 | 7,8 |
| NL8 | M8 | 1,25 | 17 | 11 | 22 | 14 |
| NL10 | M10 | 1,5 | 33 | 17 | 43 | 23 |
| NL12 | M12 | 1,75 | 56 | 25 | 75 | 33 |
| NL14 | M14 | 2,0 | 89 | 34 | 119 | 45 |
| NL16 | M16 | 2,0 | 136 | 46 | 181 | 61 |
| NL18 | M18 | 2,5 | 191 | 56 | 254 | 75 |
| NL20 | M20 | 2,5 | 267 | 72 | 356 | 95 |
| NL22 | M22 | 2,5 | 364 | 89 | 485 | 118 |
| NL24 | M24 | 3,0 | 460 | 103 | 613 | 137 |
| NL27 | M27 | 3,0 | 671 | 134 | 895 | 179 |
| NL30 | M30 | 3,5 | 915 | 164 | 1220 | 219 |
| NL33 | M33 | 3,5 | 1233 | 203 | 1644 | 270 |
| NL36 | M36 | 4,0 | 1591 | 239 | 2121 | 319 |
| NL39 | M39 | 4,0 | 2053 | 285 | 2737 | 381 |
| NL42 | M42 | 4,5 | 2540 | 328 | 3386 | 437 |
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