7 Reference information
7.4. Screw joints
4253HAC022033-001 Revision: K
© Copyright 2004-2011 ABB. All rights reserved.
The following table specifies the recommended standard tightening torque for Molycote-
lubricated screws with allen head screws.
The following table specifies the recommended standard tightening torque for water and air
connectors when one or both connectors are made of brass.
Dimension
Tightening torque (Nm)
Class 10.9, Molycote-lubricated
Tightening torque (Nm)
Class 12.9, Molycote-lubricated
M8 28 35
M10 55 70
M12 96 120
M16 235 280
M20 550
M24 790 950
Dimension
Tightening torque
Nm - Nominal
Tightening torque
Nm - Min.
Tightening torque
Nm - Max.
1/8 12 8 15
1/4 15 10 20
3/8 20 15 25
1/2 40 30 50
3/4 70 55 90
Continued
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