# Tightening Torques for Screws and Nuts

Improper work can result in serious damage to the device. Observe the specified tightening torques for any assembly, repair, or maintenance work. Use torque key and pay attention to the specified direction. All screws and screw connections which are screwed into pneumatic components must be tightened according to the manufacturer’s instructions with the specified tightening torque.

## Tightening torques for metric screws

For mounting the joining tool the following specifications are recommended:

- Utilization of elastic limit: 80%

- Strength class: 8.8

- Zinc-plated

The following values in the table are based on a friction coefficient of 0.12:

Nominal Diameter | M3 | M4 | M5 | M6 | M8 | M10 | M12
Tightening torque (Nm) | 1.2 | 3.0 | 6.0 | 10 | 25 | 49 | 85

## Applies to: