STANDARD TIGHTENING TORQUES FOR NUTS AND BOLTS STANDARD TIGHTENING TORQUES FOR NUTS AND BOLTS The tightening torques for certain specific components and special tightening methods are indicated in the relative assembly paragraphs. The tightening torques indicated below refer to bolts and nuts assembled without lubrication and, where ap- plicable, with anaerobic threadlocking compound. The values apply to tightening on steel or cast iron components; for soft materials such as aluminium, copper, plastic, sheet metal or panels, the indicated tightening torques must be reduced by 50% . 00-12 BOLT SIZE BOLT CLASS 8.8 10.9 12.9 Nm lb.ft. Nm lb.ft. Nm lb.ft.
COARSE THREAD M6x1 8.0 – 8.8 5.9 – 6.5 11.8 – 13.0 8.7 – 9.6 13.8 – 15.2 10.2 – 11.2 M8x1.25 19.4 – 21.4 14.3 – 15.8 28.5 – 31.5 21.0 – 23.2 33.3 – 36.9 24.5 – 27.2 M10x1.5 38.4 – 42.4 28.3 – 31.2 56.4 – 62.4 41.6 – 46.0 67.4 – 74.4 49.7 – 54.8 M12x1.75 66.5 – 73.5 49.0 – 54.2 96.9 – 107 71.4 – 78.9 115 – 128 84.8 – 94.3 M14x2 106 – 117 78.1 – 86.2 156 – 172 115.0 – 126.8 184 – 204 135.6 – 150.3 M16x2 164 – 182 120.9 – 134.1 241 – 267 117.6 – 196.8 282 – 312 207.8 – 229.9 M18x2.5 228 – 252 168.0 – 185.7 334 – 370 246.2 – 272.7 391 – 432 288.2 – 318.4 M20x2.5 321 – 355 236.6 – 261.6 472 – 522 347.9 – 384.7 553 – 611 407.6 – 450.3 M22x2.5 441 – 487 325.0 – 358.9 647 – 715 476.8 – 527.0 751 – 830 553.5 – 611.7 M24x3 553 – 611 407.6 – 450.3 812 – 898 598.4 – 661.8 950 – 1050 700.2 – 773.9 M27x3 816 – 902 601.4 – 664.8 1198 – 1324 882.9 – 975.8 1419 – 1569 1045.8 – 1156.4 FINE THREAD M8x1 20.8 – 23.0 15.3 – 17.0 30.6 – 33.8 22.6 – 24.9 35.8 – 39.6 26.4 – 29.2 M10x1.25 40.6 – 44.8 29.9 – 33.0 59.7 – 65.9 44.0 – 48.6 71.2 – 78.6 52.5 – 57.9 M12x1.25 72.2 – 79.8 53.2 – 58.8 106 – 118 78.1 – 87.0 126 – 140 92.9 – 103.2 M12x1.5 69.4 – 76.7 51.1 – 56.5 102 – 112 75.2 – 82.5 121 – 134 89.2 – 98.8 M14x1.5 114 – 126 84.0 – 92.9 168 – 186 123.8 – 137.1 199 – 220 146.7 – 162.1 M16x1.5 175 – 194 129 – 143 257 – 285 189.4 – 210.0 301 – 333 221.8 – 245.4 M18x1.5 256 – 282 188.7 – 207.8 375 – 415 276.4 – 305.9 439 – 485 323.5 – 357.4 M20x1.5 355 – 393 261.6 – 289.6 523 – 578 385.5 – 426.0 611 – 676 450.3 – 498.2 M22x1.5 482 – 532 355.2 – 392.1 708 – 782 521.8 – 576.3 821 – 908 605.1 – 669.2 M24x2 602 – 666 443.7 – 490.8 884 – 978 651.5 – 720.8 1035 – 1143 762.8 – 842.4