Steel Fasteners - Pre-load And Tightening Torques - Fine Metric Threads

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Steel fasteners - pre-load and tightening torques - fine metric threads
Preload (N) property class to ISO 898/1 Tightening torque (Nm) property class
Thread Coefficient friction 8.8 10.9 12.9 8.8 10.9 12.9
M8 x 1 0.100 19500 27500 33000 22 30 36
0.125 18600 26200 31500 25 35 42
0.140 18100 25500 30600 27 38 45
M10 x 1.25 0.100 30500 42900 51500 42 59 71
0.125 29110 40900 49100 49 68 82
0.140 28300 39800 47700 52 73 88
M12 x 1.25 0.100 46600 65500 78500 76 105 130
0.125 44600 62500 75000 88 125 150
0.140 43300 6100 7300 95 135 160
M14 x 1.5 0.100 63000 88500 106000 120 165 200
0.125 60500 85000 102000 140 195 235
0.140 58500 82500 99000 150 210 250
M16 x 1.5 0.100 85000 120000 144000 180 250 300
0.125 81500 114000 137000 210 295 350
0.140 79000 111000 133000 225 315 380
M18 x 1.5 0.100 111000 156000 187000 260 365 435
0.125 106000 149000 179000 305 425 510
0.140 103000 145000 174000 325 460 550
M20 x 1.5 0.100 140000 197000 236000 360 360 510
0.125 134000 189000 226000 425 600 720
0.140 130000 183000 220000 460 640 770
M22 x 1.5 0.100 172000 242000 291000 480 680 810
0.125 165000 234000 279000 570 800 960
0.140 161000 226000 271000 610 860 1050
M24 x 2 0.100 197000 277000 332000 610 860 1050
0.125 188000 265000 318000 720 1000 1200
0.140 183000 257000 30900 780 1100 1300

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