B58FZS 0000000078 EN 002 110
CONTENTS
11.3 Tightening torque for screws
Make sure that the threads are clean! The specified tightening torques are valid for screws and
threads that are clean, dry and free of grease.
Tightening torque for screws
Thread
Strength category
8.8 10.9 12.9
Nm lb-ft Nm lb-ft Nm lb-ft
M8 27 20 36 27 42 31
M8x1 29 21 38 28 45 33
M10 544071528361
M10x1.25 57 42 75 55 87 64
M12 93 69 123 91 144 106
M12x1.5 97 72 128 94 150 111
M12x1.25 101 74 133 98 155 114
M14 148 109 195 144 229 169
M14x1.5 159 117 209 154 244 180
M16 230 170 302 223 354 261
M16x1.5 244 180 320 236 374 276
M18 329 243 421 311 492 363
M18x2 348 257 443 327 519 383
M18x1.5 368 271 465 343 544 401
M20 464 342 592 437 692 510
M20x2 488 360 619 457 724 534
M20x1.5 511 377 646 476 756 558
M22 634 468 807 595 945 697
M22x2 663 489 840 620 984 726
M22x1.5 692 510 873 644 1022 754
M24 798 589 1017 750 1190 878
M24x2 865 638 1095 808 1282 946
M27 1176 867 1496 1103 1750 1291
M27x2 1262 931 1594 1176 1866 1376
M30 1597 1178 2033 1499 2380 1755
M30x2 1756 1295 2216 1634 2594 1913
5/8“ UNC (normal) 230 170 302 223
5/8“ UNF (fine) 244 180 320 236
3/4" UNC (normal) 464 342 592 437
3/4" UNF (fine) 511 377 646 476
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