D I S T R I B U T I O N S O LU T I O N S
47
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A. Tightening torques for steel screws and nuts/bolts
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Nuts and bolts
Max. tightening torque [Nm]
Type
Steel class 8.8
M4
3
M5
5
M6
9
M8
22
M10
45
M12
75
M16
185
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Cheese-head socket screws
Max. tightening torque [Nm]
Type
Steel class 8.8
M4
2
M5
4
M6
8
M8
12
M10
35
M12
50
M16
110
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Socket-head screws and round-headed Torx
Max. tightening torque [Nm]
Type
Steel class 8.8
Steel class 10.9
M4
2
2
M5
4
4
M6
8
8
M8
12
12
M10
30
M12
60
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Hexagonal-head bolts with flange
Max. tightening torque [Nm]
Type
Steel class 90
M5
9
M6
16
M8
34
M10
58
M12
97
M16
215
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Cheese-head Torx Fastite screw
Max. tightening torque [Nm]
Type
Steel class 8.8
M6
20
The values in the tables must be used unless the torque is specified in the table of joint types.