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


Note: Due to the fact that fastening applications differ greatly, the above information is for guidance only and is correct to the best of our knowledge. The customer must satisfy themselves with the performance of the fastener and validity of the data. TR Fastenings will not be held responsible for any failure that may occur from the use of this information.