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7 Reference information
7.4. Screw joints
Continued
The table below specifies the recommended standard tightening torque for oil-lubricated
screws with Allen head screws.
Dimension
M5
M6
M8
M10
M12
M16
M24
The table below specifies the recommended standard tightening torque for Molycote-
lubricated screws with Allen head screws.
Dimension
M8
M10
M12
M16
M24
The table below specifies the recommended standard tightening torque for water and air
connectors when one or both connectors are made of brass.
Dimension
1/8
1/4
3/8
1/2
3/4
392
Tightening torque
(Nm)
Class 8.8, oil-lubri-
cated
6
10
24
47
82
200
725
Tightening torque (Nm)
Class 10.9, Molycote-lubricated
28
55
96
235
790
Tightening torque
Nm - Nominal
12
15
20
40
70
Tightening torque
(Nm)
Class 10.9, oil-lubri-
cated
-
-
34
67
115
290
960
Tightening torque (Nm)
Class 12.9, Molycote-lubricated
35
70
120
280
950
Tightening torque
Nm - Min.
8
10
15
30
55
3HAC022033-001 Revision: E
Tightening torque
(Nm)
Class 12.9, oil-lubri-
cated
-
-
40
80
140
340
1150
Tightening torque
Nm - Max.
15
20
25
50
90
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