Steel fasteners - pre-load and tightening torques - coarse metric threads
Maximum pre-load (N) property class to ISO898/1 | Maximum tightening torque (Ncm) property class to ISO898/1 | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread | Coeff of friction | 3.6 | 4.6 | 5.6 4.8 | 5.8 | 8.8 | 10.9 | 12.9 | 3.6 | 4.6 | 5.6 4.8 | 5.8 | 8.8 | 10.9 | 12.9 | Conv factor |
M1.6 | 0.1 | 185 | 200 | 250 | 333 | 575 | 810 | 970 | 4.5 | 5 | 6.5 | 8.5 | 15 | 21 | 25 | 0.026 |
0.125 | 175 | 190 | 240 | 310 | 544 | 770 | 920 | 5 | 5.5 | 7.5 | 9.5 | 17 | 24 | 29 | 0.031 | |
0.14 | 165 | 180 | 230 | 300 | 530 | 746 | 895 | 6.5 | 6 | 8 | 10 | 18 | 25 | 30 | 0.034 | |
M1.8 | 0.1 | 220 | 230 | 295 | 380 | 680 | 995 | 1150 | 5.5 | 6 | 8 | 10 | 18.5 | 26 | 32 | 0.027 |
0.125 | 205 | 220 | 280 | 360 | 645 | 905 | 1090 | 6.5 | 7 | 9.5 | 11.5 | 21 | 30 | 36 | 0.033 | |
0.14 | 200 | 215 | 275 | 350 | 625 | 880 | 1050 | 7 | 7.5 | 10 | 12.5 | 13 | 32 | 38 | 0.036 | |
M2.0 | 0.1 | 310 | 335 | 420 | 540 | 960 | 1350 | 1620 | 9.5 | 10.5 | 13.5 | 17 | 31 | 44 | 52 | 0.032 |
0.125 | 295 | 320 | 400 | 520 | 910 | 1280 | 1530 | 11.5 | 12 | 15.5 | 19 | 35 | 50 | 60 | 0.039 | |
0.14 | 285 | 305 | 385 | 500 | 880 | 1240 | 1490 | 12 | 13 | 16.5 | 21.5 | 38 | 53 | 64 | 0.043 | |
M2.5 | 0.1 | 515 | 560 | 700 | 910 | 1600 | 2250 | 2700 | 20 | 21 | 28 | 36 | 63 | 89 | 107 | 0.04 |
0.125 | 490 | 530 | 665 | 860 | 1520 | 2140 | 2560 | 23 | 25 | 32 | 39 | 73 | 102 | 123 | 0.048 | |
0.14 | 475 | 510 | 645 | 830 | 1470 | 2070 | 2480 | 25 | 27 | 34 | 43 | 78 | 109 | 131 | 0.053 | |
M3.0 | 0.1 | 790 | 855 | 1070 | 1390 | 2440 | 3430 | 4120 | 35 | 38 | 49 | 63 | 111 | 157 | 188 | 0.046 |
0.125 | 770 | 815 | 1020 | 1320 | 2320 | 3270 | 3920 | 42 | 44 | 56 | 72 | 128 | 180 | 215 | 0.055 | |
0.14 | 730 | 785 | 985 | 1280 | 2250 | 3170 | 3800 | 44 | 47 | 60 | 78 | 137 | 192 | 230 | 0.061 | |
M3.5 | 0.1 | 1050 | 1140 | 1430 | 1850 | 3270 | 4600 | 5520 | 54 | 59 | 75 | 96 | 171 | 240 | 290 | 0.052 |
0.125 | 1000 | 1080 | 1360 | 1760 | 3120 | 4380 | 5260 | 63 | 68 | 86 | 110 | 196 | 275 | 330 | 0.063 | |
0.14 | 970 | 1050 | 1320 | 1710 | 3020 | 4250 | 5100 | 67 | 73 | 92 | 119 | 210 | 295 | 395 | 0.07 | |
M4.0 | 0.1 | 1370 | 1480 | 1850 | 2400 | 4230 | 5960 | 7140 | 83 | 88 | 112 | 144 | 255 | 360 | 430 | 0.06 |
0.125 | 1300 | 1400 | 1760 | 2280 | 4020 | 5660 | 6790 | 94 | 102 | 128 | 166 | 290 | 410 | 495 | 0.073 | |
0.14 | 1260 | 1360 | 1710 | 2220 | 3900 | 5480 | 6580 | 100 | 108 | 137 | 177 | 310 | 440 | 525 | 0.08 | |
M5.0 | 0.1 | 2250 | 2410 | 3020 | 3920 | 6910 | 9720 | 11650 | 160 | 170 | 220 | 280 | 500 | 705 | 845 | 0.072 |
0.125 | 2140 | 2300 | 2880 | 3740 | 6580 | 9260 | 11100 | 180 | 200 | 250 | 320 | 575 | 810 | 970 | 0.087 | |
0.14 | 2000 | 2230 | 2790 | 3620 | 6380 | 8980 | 10800 | 190 | 210 | 270 | 340 | 615 | 865 | 1040 | 0.096 |
Maximum pre-load (N) property class to ISO898/1 | Maximum tightening Torque (Nm) property class to ISO898/1 | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread | Coeff of friction | 3.6 | 4.6 | 5.6 4.8 | 5.8 | 8.8 | 10.9 | 12.9 | 3.6 | 4.6 | 5.6 4.8 | 5.8 | 8.8 | 10.9 | 12.9 | Conv factor |
M6 | 0.1 | 3200 | 3400 | 4270 | 5550 | 9760 | 13700 | 16450 | 2.8 | 3 | 3.8 | 4.8 | 8.6 | 12 | 14.5 | 0.00087 |
0.125 | 3050 | 3240 | 4060 | 5270 | 9290 | 13050 | 15650 | 3.2 | 3.4 | 4.3 | 5.6 | 9.9 | 14 | 16.5 | 0.00106 | |
0.14 | 2960 | 1350 | 3940 | 5120 | 9010 | 12650 | 15200 | 3.5 | 3.7 | 4.6 | 6 | 10.5 | 15 | 18 | 0.00117 | |
M8 | 0.1 | 5877 | 6260 | 7830 | 10170 | 17900 | 25200 | 30200 | 6.8 | 7.2 | 9.1 | 11.7 | 21 | 29 | 35 | 0.00115 |
0.125 | 5590 | 5960 | 7460 | 9690 | 17050 | 24000 | 28800 | 7.9 | 8.3 | 10.5 | 13.6 | 24 | 34 | 40 | 0.0014 | |
0.14 | 5420 | 5780 | 7230 | 9390 | 16550 | 23200 | 27900 | 8.4 | 8.9 | 11 | 14.5 | 26 | 36 | 43 | 0.00145 | |
M10 | 0.1 | 9350 | 9960 | 12450 | 16180 | 28500 | 40100 | 48100 | 13.5 | 14.4 | 18 | 23.4 | 42 | 58 | 70 | 0.00175 |
0.125 | 8900 | 9480 | 11850 | 15400 | 27100 | 38200 | 45800 | 15.5 | 16.6 | 21 | 27 | 48 | 67 | 81 | 0.00195 | |
0.14 | 8640 | 9200 | 11500 | 14900 | 26300 | 37000 | 44400 | 17 | 18 | 22 | 29 | 51 | 72 | 87 | 0.00175 | |
M12 | 0.1 | 13600 | 14520 | 18150 | 23500 | 41500 | 58400 | 70000 | 24 | 25 | 31 | 41 | 72 | 101 | 121 | 0.0021 |
0.125 | 13000 | 13840 | 17300 | 22400 | 39600 | 55600 | 66800 | 27 | 29 | 36 | 47 | 83 | 117 | 140 | 0.0023 | |
0.14 | 12600 | 13400 | 16800 | 21800 | 38400 | 54000 | 64800 | 29 | 31 | 39 | 50 | 89 | 125 | 150 | 0.002 | |
M14 | 0.1 | 18700 | 19900 | 24900 | 32300 | 57000 | 80100 | 96200 | 37 | 40 | 50 | 47 | 114 | 160 | 193 | 0.0024 |
0.125 | 17800 | 19000 | 23800 | 30900 | 54300 | 76400 | 91700 | 43 | 46 | 58 | 74 | 132 | 185 | 220 | 0.0027 | |
0.14 | 17300 | 18400 | 23100 | 3000 | 52700 | 74100 | 89000 | 46 | 50 | 62 | 81 | 141 | 198 | 240 | 0.0022 | |
M16 | 0.1 | 25700 | 27400 | 34300 | 44500 | 78300 | 110000 | 132000 | 57 | 60 | 76 | 98 | 174 | 245 | 295 | 0.0027 |
0.125 | 24500 | 26100 | 32700 | 42500 | 74700 | 105000 | 126000 | 66 | 70 | 88 | 115 | 200 | 285 | 340 | 0.003 | |
0.14 | 23800 | 25300 | 31700 | 41200 | 72600 | 102000 | 122500 | 71 | 76 | 95 | 124 | 215 | 305 | 365 | 0.0025 | |
M18 | 0.1 | 31300 | 33300 | 41700 | 54200 | 95300 | 134000 | 161000 | 79 | 83 | 105 | 135 | 240 | 340 | 405 | 0.003 |
0.125 | 29800 | 31700 | 39700 | 51600 | 90900 | 128000 | 153500 | 91 | 95 | 121 | 155 | 275 | 390 | 470 | 0.0034 | |
0.14 | 28900 | 30800 | 38600 | 50100 | 88200 | 88200 | 149000 | 97 | 105 | 130 | 171 | 295 | 420 | 500 | 0.0028 | |
M20 | 0.1 | 40200 | 42800 | 53500 | 69500 | 122500 | 172000 | 206000 | 111 | 120 | 148 | 195 | 340 | 475 | 570 | 0.0033 |
0.125 | 38300 | 40800 | 5110 | 66400 | 117000 | 164000 | 197000 | 128 | 135 | 170 | 219 | 390 | 550 | 660 | 0.0037 | |
0.14 | 37200 | 39600 | 49600 | 66400 | 113500 | 159000 | 1915000 | 138 | 146 | 184 | 238 | 420 | 590 | 710 | 0.0033 |
Maximum pre-load (N) property class to ISO898/1 | Maximum tightening torque (Nm) property class to ISO898/1 | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread | Coeff of friction | 3.6 | 4.6 | 5.6 4.8 | 5.8 | 8.8 | 10.9 | 12.9 | 3.6 | 4.6 | 5.6 4.8 | 5.8 | 8.8 | 10.9 | 12.9 | Conv factor |
M22 | 0.1 | 50100 | 53400 | 66800 | 86800 | 153000 | 215000 | 258000 | 149 | 160 | 199 | 260 | 455 | 640 | 765 | 0.0036 |
0.125 | 47900 | 51000 | 63800 | 82900 | 146000 | 205000 | 246000 | 173 | 183 | 230 | 298 | 530 | 745 | 890 | 0.004 | |
0.14 | 46500 | 49600 | 62000 | 80600 | 142000 | 199500 | 239500 | 186 | 198 | 250 | 322 | 570 | 800 | 960 | 0.0033 | |
M24 | 0.1 | 57800 | 61600 | 77100 | 100200 | 176000 | 248000 | 297000 | 191 | 203 | 255 | 330 | 580 | 820 | 980 | 0.004 |
0.125 | 55200 | 58800 | 73600 | 95680 | 168000 | 236000 | 284000 | 220 | 235 | 295 | 382 | 675 | 950 | 1140 | 0.0044 | |
0.14 | 53600 | 57100 | 71400 | 92800 | 163500 | 230000 | 276500 | 235 | 251 | 315 | 408 | 725 | 1020 | 1220 | 0.0037 | |
M27 | 0.1 | 76000 | 81200 | 101500 | 131900 | 323000 | 326000 | 391000 | 280 | 300 | 375 | 488 | 855 | 1210 | 1450 | 0.0045 |
0.125 | 72600 | 77400 | 96800 | 125800 | 221000 | 311000 | 374000 | 325 | 348 | 435 | 566 | 995 | 1400 | 1680 | 0.005 | |
0.14 | 70600 | 75200 | 94100 | 122300 | 215000 | 302000 | 363000 | 350 | 376 | 470 | 610 | 1070 | 1510 | 1810 | 0.0041 | |
M30 | 0.1 | 92500 | 98800 | 123500 | 160500 | 282000 | 396000 | 475000 | 380 | 405 | 510 | 658 | 1160 | 1640 | 1970 | 0.005 |
0.125 | 88300 | 9400 | 117500 | 162700 | 269000 | 378000 | 454000 | 445 | 470 | 590 | 763 | 1350 | 1900 | 2280 | 0.0055 | |
0.14 | 85700 | 91600 | 114500 | 148800 | 261000 | 367000 | 441000 | 475 | 504 | 635 | 818 | 1450 | 2050 | 2450 | 0.0045 | |
M33 | 0.1 | 115000 | 122800 | 153500 | 199500 | 351000 | 949000 | 592000 | 515 | 552 | 690 | 898 | 1570 | 2210 | 2650 | 0.0055 |
0.125 | 110000 | 117200 | 146500 | 190400 | 335000 | 472000 | 566000 | 600 | 645 | 800 | 1045 | 1830 | 2580 | 3090 | 0.006 | |
0.14 | 107000 | 114000 | 142500 | 185200 | 326000 | 458000 | 550000 | 645 | 685 | 865 | 1110 | 1970 | 2770 | 3330 | 0.0049 | |
M36 | 0.1 | 135000 | 144000 | 180000 | 234000 | 412000 | 579000 | 695000 | 665 | 705 | 885 | 1145 | 2030 | 2850 | 3420 | 0.006 |
0.125 | 129000 | 137600 | 172000 | 223600 | 394000 | 553000 | 664000 | 775 | 825 | 1030 | 1340 | 2360 | 3310 | 3980 | 0.0066 | |
0.14 | 125500 | 134000 | 167500 | 217700 | 382000 | 538000 | 645000 | 830 | 885 | 1111 | 1435 | 2530 | 3560 | 4280 | 0.0053 | |
M39 | 0.1 | 162500 | 173500 | 217000 | 282100 | 495000 | 696000 | 835000 | 860 | 920 | 1150 | 1495 | 2620 | 3680 | 4420 | 0.0053 |
0.125 | 155000 | 165600 | 207000 | 269100 | 473000 | 665000 | 798000 | 1000 | 1075 | 1340 | 1750 | 3050 | 4290 | 5150 | 0.0065 | |
0.14 | 151000 | 160800 | 201000 | 261300 | 460000 | 646000 | 776000 | 1080 | 1155 | 1440 | 1880 | 3290 | 4620 | 5550 | 0.0072 |