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Chapter 2 SERVICE DATA
2.8 Tightening Torque for Standard Bolts
Note:(a) The tightening torque listed in this table is for standard bolts and nuts.
(b) The numerical values in the table are the values when spring washers are used.
(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)
Threads
Thread size
Dia. x Pitch
(M-thread)
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
8 x 1.25 12 [0.47] 17 1.7 12.3 30 3.1 22.4
10 x 1.25 14 [0.55] 33 3.4 24.6 60 6.1 44.1
12 x 1.25 17 [0.67] 60 6.1 44.1 108 11.0 79.6
14 × 1.5 22 [0.87] 97 9.9 71.6 176 17.9 129.5
16 x 1.5 24 [0.94] 145 14.8 107.1 262 26.7 193.1
18 x 1.5 27 [1.06] 210 21.4 154.8 378 38.5 278.5
20 x 1.5 30 [1.18] 291 29.7 214.8 524 53.4 386.2
22 x 1.5 32 [1.26] 385 39.3 284.3 694 70.8 512.1
24 × 1.5 36 [1.42] 487 49.7 359.5 878 89.5 647.4
27 × 1.5 41 [1.61] 738 75.3 544.7 1328 135.5 980.1
Metric course screw
thread
N·m kgf·m lbf·ft N·m kgf·m lbf·ft
10 x 1.5 14 [0.55] 32 3.3 23.9 58 5.9 42.67
12 x 1.75 17 [0.67] 57 5.8 42.0 102 10.4 75.2
14 × 2 22 [0.87] 93 9.5 68.7 167 17.0 123.0
16 × 2 24 [0.94] 139 14.2 102.7 251 25.6 185.2
18 × 2.5 27 [1.06] 194 19.8 143.2 350 35.7 258.2
20 × 2.5 30 [1.18] 272 27.7 200.4 489 49.9 361.0
22 × 2.5 32 [1.26] 363 37.0 267.6 653 66.6 482.0
24 × 3 36 [1.42] 468 47.7 345.0 843 86.0 622.0
27 × 3 41 [1.61] 686 70.0 506.3 1236 126.0 911.4
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