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Bolt tightening torque
Hexagon bolt
1. Thread type
Metric thread, Unified thread
2. Bolt strength
8.8 (8T) ~ 10.9 (11T)
3. Thread pitch
Metric thread: Coarse pitch thread (C), fine pitch thread (F)
Unified thread: Coarse pitch thread (UNC), fine pitch thread (UNF)
Type
Nominal
dimension
M8
M10
M12
M14
M16
M18
Metric thread
M20
M22
M24
M27
M30
M33
5/16
3/8
7/16
1/2
Unified thread
9/16
5/8
3/4
7/8
Note: Tighten the bolts according to the above list, unless otherwise specified.
Bolt size
Nominal
Pitch
diameter
8
(C) 1.25
(C) 1.5
10
(F) 1.25
(C) 1.75
12
(F) 1.25
(C) 2.0
14
(F) 1.5
(C) 2.0
16
(F) 1.5
(C) 2.5
18
(F) 1.5
(C) 2.5
20
(F) 1.5
(C) 2.5
22
(F) 1.5
(C) 3.0
24
(F) 2.0
(C) 3.0
27
(F) 2.0
(C) 3.5
30
(F) 2.0
(C) 3.5
33
(F) 2.0
05
18 UNC
06
16 UNC
07
14 UNC
08
13 UNC
09
12 UNC
10
11 UNC
12
10 UNC
14
9 UNC
1
16
8 UNC
Bolt strength
8.8 (8T)
10.9 (11T)
26
38
53
76
55
80
90
132
96
142
142
206
152
221
216
314
226
330
299
436
324
476
417
608
451
662
559
814
598
878
721
1,030
770
1,128
1,030
1,520
1,128
1,618
1,422
2,109
1,569
2,256
1,912
2,844
2,059
3,040
25
35
44
65
71
103
103
147
147
216
201
294
358
525
554
809
868
1,275
ZW370 FS 00-13
00 General Information
Outline
(N-m)
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