(2)
Tightening torque
Part name
Hexagon socket head bolt
(material : SCM435)
PT Plug (material : S45C)
※ W ind a seal tape 1.5 to 2
turns round the plug
PF Plug (material : S45C)
Torque
Bolt size
kgf·m
M 5
0.7
M 6
1.2
M 8
3.0
M10
5.8
M12
10.0
M14
16.0
M16
24.0
M18
34.0
M20
44.0
PT1/16
0.7
PT 1/8
1.05
PT 1/4
1.75
PT 3/8
3.5
PT 1/2
5.0
PF 1/4
3.0
PF 3/8
7.55
PF 1/2
10.0
PF 3/4
15.0
PF 1
19.0
PF 1 1/4
27.0
PF 1 1/2
28.0
8-12
Wrench size
lbf·ft
in
5.1
0.16
8.7
0.20
21.7
0.24
42.0
0.31
72.3
0.39
116
0.47
174
0.55
246
0.55
318
0.67
5.1
0.16
7.59
0.20
12.7
0.24
25.3
0.31
36.2
0.39
21.7
0.24
54.6
0.31
72.3
0.39
109
0.55
137
0.67
195
0.67
203
0.67
mm
4
5
6
8
10
12
14
14
17
4
5
6
8
10
6
8
10
14
17
17
17