ABB GSec/T1 - Page 39

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A. Tightening torques for steel screws and nuts/bolts
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
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
Cheese-head Torx Fastite screw
Max. tightening torque [Nm]
Type Steel class 8.8
M6 20
Cheese-head hex. 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
Hex. socket-head and Torx round-head screws
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
The values in the tables must be used unless the torque is
specified in the table of joint types.