TM 5-3805-280-24-2
Torque
specifications
TORQUE SPECIFICATIONS
Be very careful not to mix metric with US fasteners.
UNC THREADS
METRIC THREADS
Tightening torque depends of the grade of the
Dia
Wrench
Allen key
Torque
screw. All the hexagonal head screws are of 8.8
(mm)
(mm)
(N.m)
class; most of socket head screw are of 12.9 class.
1/2"
3/4"
3/8"
65
The screw class is stamped on the head.
5/8"
15/16"
1/2"
150
Class 8.8
3/4"
1" 1/8
9/16"
280
1"
1" 5/16
7/8"
650
Wrench
Allen key
Torque
Dia
(mm)
(mm)
(N.m)
M5
8
4
6
UNF THREADS
M6
10
5
10
M8
13
6
24
Wrench
Allen key
Torque
Dia
(mm)
(mm)
(N.m)
M10
17
8
47
1/2"
3/4"
3/8"
80
M12
19
10
81
5/8"
15/16"
1/2"
150
M16
24
14
195
3/4"
1" 1/8
9/16"
300
M20
30
17
370
1"
1" 5/16
7/8"
750
M24
36
19
640
M30
46
22
1270
M36
55
27
2260
Class 12.9
Dia
Wrench
Allen key
Torque
(mm)
(mm)
(N.m)
M5
8
4
10
M6
10
5
17
M8
13
6
40
M10
17
8
80
M12
19
10
135
M16
24
14
330
M20
30
17
620
M24
36
19
1100
M30
46
22
2000
M36
55
27
3800
23-6