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 |