testing table
| 1 | 2 | 2 | 2 | 2 |
| 3 | 3 | 3 | 3 | |
| 3 | 3 | 3 | 3 | 3 |
| A4-70 Cu/C paste GF = 65%, μth= 0.13, μh= 0.13 |
A4-80 Cu/C paste GF = 65%, μth = 0.13, μh = 0.13 |
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| Bolt Size | Product Name | Pitch [mm] |
Torque [Nm] |
Clamp Load [kN] |
Torque [Nm] |
Clamp Load [kN] |
| M3 | NL3 ss-254 | 0.5 | 0.8 | 1.5 | 1.1 | 2 |
| M4 | NL4 ss-254 | 0.7 | 1.8 | 2.6 | 2.4 | 3.4 |
| M5 | NL5 ss-254 | 0.8 | 3.6 | 4.1 | 4.8 | 5.5 |
| M6 | NL6 ss-254 | 1 | 6.3 | 5.9 | 8.4 | 7.8 |
| M8 | NL8 ss-254 | 1.25 | 15 | 11 | 20 | 14 |
| M10 | NL10 ss-254 | 1.5 | 30 | 17 | 39 | 23 |
| M12 | NL12 ss-254 | 1.75 | 51 | 25 | 68 | 33 |
| M14 | NL14 ss-254 | 2 | 81 | 34 | 108 | 45 |
| M16 | NL16 ss-254 | 2 | 124 | 46 | 165 | 61 |
| M18 | NL18 ss-254 | 2.5 | 173 | 56 | 231 | 75 |
| M20 | NL20 ss-254 | 2.5 | 243 | 72 | 323 | 95 |
| M22 | NL22 ss-254 | 2.5 | 330 | 89 | 440 | 118 |
| M24 | NL24 ss-254 | 3 | 418 | 103 | 557 | 137 |
| M27 | NL27 ss-254 | 3 | 609 | 134 | 812 | 179 |
| M30 | NL30 ss-254 | 3.5 | 831 | 164 | 1108 | 219 |
| M36 | NL36ss-254 | 4 | 1444 | 239 | 1925 | 319 |
Cu/C paste = Copper/graphite paste
GF = Ratio of yield point. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point.
μth = Thread friction coefficient
μh = Under head friction coefficient
1 N = 0.225 lb
1 Nm = 0.738 ft-lb
Thread friction coefficients have theoretical values but are verified through testing.
Under head friction coefficients have been established by tests.