SERVICE DATA
2-9
2.2 Standard bolt and nut tightening torque
Note: (a) This table lists the tightening torque for standard bolts and nuts.
(b) The numerical values in the table are for fasteners with spring washers.
(c) The table shows the standard values with a maximum tolerance value of ±10%.
(d) Use the tightening torque in this table unless otherwise specified.
(e) Do not apply oil to threaded portions. (Dry)
Table 2-14 Standard bolt and nut tightening torque
Description
Threads
Dia × Pitch
(mm)
Width
across flats
(mm) [in.]
Strength classification
7T 10.9
Metric automobile screw thread
N·m kgf·m lbf·ft N·m kgf·m lbf·ft
M8 × 1.25 12 [0.47] 17 1.7 13 30 3.1 22
M10 × 1.25 14 [0.55] 33 3.4 24 60 6.1 44
M12 × 1.25 17 [0.67] 60 6.1 44 108 11.0 80
M14 × 1.5 22 [0.87] 97 9.9 72 176 17.9 130
M16 × 1.5 24 [0.94] 145 14.8 107 262 26.7 193
M18 × 1.5 27 [1.06] 210 21.4 155 378 38.5 279
M20 × 1.5 30 [1.18] 291 29.7 215 524 53.4 386
M22 × 1.5 32 [1.26] 385 39.3 284 694 70.8 512
M24 × 1.5 36 [1.42] 487 49.7 359 878 89.5 648
M27 × 1.5 41 [1.61] 738 75.3 544 1328 135.5 979
Metric course screw thread
N·m kgf·m lbf·ft N·m kgf·m lbf·ft
M10 × 1.5 14 [0.55] 32 3.3 24 58 5.9 43
M12 × 1.75 17 [0.67] 57 5.8 42 102 10.4 75
M14 × 2 22 [0.87] 93 9.5 69 167 17.0 123
M16 × 2 24 [0.94] 139 14.2 103 251 25.6 185
M18 × 2.5 27 [1.06] 194 19.8 143 350 35.7 258
M20 × 2.5 30 [1.18] 272 27.7 201 489 49.9 361
M22 × 2.5 32 [1.26] 363 37.0 268 653 66.6 482
M24 × 3 36 [1.42] 468 47.7 345 843 86.0 622
M27 × 3 41 [1.61] 686 70.0 506 1236 126.0 912
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