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Miscellaneous—Machine
DX,TORQ2 -19-30MAY18-1/1
Metric Bolt and Screw Torque Values
TS1742 —UN—31MAY18
4.84.8 8.8 9.8 10.9
12.9
12.9
10.9
9.8
8.8
4.8
Class 4.8 Class 8.8 or 9.8 Class 10.9 Class 12.9
Bolt or Screw
Size
Hex Head
a
Flange
Head
b
Hex Head
a
Flange
Head
b
Hex Head
a
Flange
Head
b
Hex Head
a
Flange
Head
b
N·m lb·in N·m lb·in N·m lb·in N·m lb·in N·m lb·in N·m lb·in N·m lb·in N·m lb·in
M6 3.6 31.9 3.9 34.5 6.7 59.3 7.3 64.6 9.8 86.7 10.8 95.6 11.5 102 12.6 112
N·m
lb·ft
N·m
lb·ft N·m lb·ft N·m lb·ft
M8 8.6 76.1 9.4 83.2 16.2 143 17.6 156 23.8 17.6 25.9 19.1 27.8 20.5 30.3 22.3
N·m
lb·ft
N·m
lb·ft
N·m
lb·ft
M10 16.9 150 18.4 13.6 31.9 23.5 34.7 25.6 46.8 34.5 51 37.6
55
40.6 60 44.3
N·m
lb·ft
M12
— — — —
55
40.6 61 45 81 59.7 89 65.6 95 70.1 105 77.4
M14
— — — —
87 64.2 96 70.8 128 94.4 141 104 150 111 165 122
M16
— — — —
135 99.6 149 110 198 146 219 162 232 171 257 190
M18
— — — —
193 142 214 158 275 203 304 224 322 245 356 263
M20
— — — —
272 201 301 222 387 285 428 316 453 334 501 370
M22
— — — —
365 263 405 299 520 384 576 425 608 448 674 497
M24
— — — —
468 345 518 382 666 491 738 544 780
575
864 637
M27
— — — —
683 504 758 559 973 718 1080 797 1139 840 1263 932
M30
— — — —
932 687 1029 759 1327 979 1466 1081 1553 1145 1715 1265
M33
— — — —
1258 928 1398 1031 1788 1319 1986 1465 2092 1543 2324 1714
M36
— — — —
1617 1193 1789 1319 2303 1699 2548 1879 2695 1988 2982 2199
The nominal torque values listed are for general use only with the assumed
wrenching accuracy of 20%, such as a manual torque wrench.
DO NOT use these values if a different torque value or tightening procedure is
given for a specic application.
For lock nuts, for stainless steel fasteners, or for nuts on U-bolts, see the
tightening instructions for the specic application.
Replace fasteners with the same or higher property class. If
higher property class fasteners are used, tighten these to the
strength of the original.
•
Make sure that fastener threads are clean.
•
Apply a thin coat of Hy-Gard™ or equivalent oil under the head and on the threads of the fastener, as shown in the following image.
•
Be conservative with the amount of oil to reduce the potential for hydraulic lockup in blind holes due to excessive oil.
•
Properly start thread engagement.
TS1741 —UN—22MAY18
a
Hex head column values are valid for ISO 4014 and ISO 4017 hex head, ISO 4162 hex socket head, and ISO 4032 hex nuts.
b
Hex ange column values are valid for ASME B18.2.3.9M, ISO 4161, or EN 1665 hex ange products.
4-1-20
112321
PN=280
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