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Chapter 2 SERVICE DATA
2.8 Tightening Torque for Standard Bolts
Threads
Metric automobile screw thread
Metric course screw thread
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)
2-22
Width across
Thread size
flats
Dia. x Pitch
(mm)
M 8 × 1.25
12
M 10 × 1.25
14
M 12 × 1.25
17
M 14 × 1.5
22
M 16 × 1.5
24
M 18 × 1.5
27
M 20 × 1.5
30
M 22 × 1.5
32
M 24 × 1.5
36
M 27 × 1.5
41
M 10 × 1.5
14
M 12 × 1.75
17
M 14 × 2
22
M 16 × 2
24
M 18 × 2.5
27
M 20 × 2.5
30
M 22 × 2.5
32
M 24 × 3
36
M 27 × 3
41
Strength classification
7T
7
N·m
kgf·m
lbf·ft
17
1.7
12.5
33
3.4
24.3
60
6.1
44.3
97
9.9
71.5
145
14.8
106.9
210
21.4
154.9
291
29.7
214.6
385
39.3
284.0
487
49.7
359.2
738
75.3
544.3
N·m
kgf·m
lbf·ft
32
3.3
23.6
57
5.8
42.0
93
9.5
68.6
139
14.2
102.5
194
19.8
143.1
272
27.7
200.6
363
37.0
267.7
468
47.7
345.2
686
70.0
506.0
10.9
10
N·m
kgf·m
lbf·ft
30
3.1
22.1
60
6.1
44.3
108
11.0
79.7
176
17.9
129.8
262
26.7
193.2
378
38.5
278.8
524
53.4
386.5
694
70.8
511.9
878
89.5
647.6
1328
135.5
979.5
N·m
kgf·m
lbf·ft
58
5.9
42.8
102
10.4
75.2
167
17.0
123.2
251
25.6
185.1
350
35.7
258.1
489
49.9
360.7
653
66.6
481.6
843
86.0
621.8
1236
126.0
911.6
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