Appendix Operation and Maintenance Manual
Standard tightening torques
Threads Nm ft/lb Nm ft/lb Nm ft/lb
M12 79 58.27 117 86.29 135 99.57
M14 125 92.2 185 136.45 215 158.58
M16 195 143.82 280 206.52 330 243.4
M18 280 206.52 390 287.65 460 339.28
M20 390 287.65 560 413.03 650 479.42
M22 530 390.91 750 553.17 880 649.05
M24 670 494.17 960 708.06 1120 826.07
M27 1000 737.56 1400 1032.59 1650 1216.98
M30 1350 995.71 1900 1401.37 2250 1659.51
M33 1850 1364.49 2600 1917.66 3000 2212.69
M36 2350 1733.27 3300 2433.96 3900 2876.49
M39 3000 2212.69 4300 3171.52 5100 3761.57
Tab. 43: Tightening torques for screws with hexagonal and external hexalobular heads – part 1
Threads Nm ft/lb Nm ft/lb Nm ft/lb
8.8 10.9 12.9
M 8 x 1 25 18.44 36 26.55 43 31.72
M 9 x 1 36 26.55 53 39.09 62 45.73
M 10 x 1 52 38.35 76 56.05 89 65.64
M 10 x 1.25 49 36.14 72 53.1 84 61.96
M 12 x 1.25 87 64.17 125 92.2 150 110.63
M 12 x 1.5 83 61.22 122 89.98 145 106.95
M 14 x 1.5 135 99.57 200 147.51 235 173.33
M 16 x 1.5 205 151.2 300 221.27 360 265.52
M 18 x 1.5 310 228.64 440 324.53 520 383.53
M 18 x 2 290 213.89 420 309.78 490 361.41
M 20 x 1.5 430 317.15 620 457.29 720 531.04
M 22 x 1.5 580 427.79 820 604.8 960 708.06
M 24 x 1.5 760 560.55 1090 803.94 1270 936.7
M 24 x 2 730 538.42 1040 767.06 1220 899.83
M 27 x 1.5 1110 818.69 1580 1165.35 1850 1364.49
M 27 x 2 1070 789.19 1500 1106.34 1800 1327.61
M 30 x 1.5 1540 1135.85 2190 1615.26 2560 1888.16
M 30 x 2 1490 1098.97 2120 1563.63 2480 1829.15
M 33 x 1.5 2050 1512 2920 2153.68 3420 2522.46
M 33 x 2 2000 1475.12 2800 2065.17 3300 2433.96
M 36 x 1.5 2680 1976.67 3820 2817.49 4470 3296.9
M 36 x 3 2500 1843.91 3500 2581.47 4100 3024
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KD83V16 33521030601_0_1 EN_US
2018-07