Al Metal Special Metal Parts

Tightening torques and loads

The following table contains guideline values for screws in steel groups A2-70 and A4-70 with standard metric threads according to DIN 13.

¹⁾ The values correspond to 100% of the 0.2% yield stress

Notes on application:

When selecting the correct screw diameter it should be ensured that the total load on the screw does not exceed 90% of the standardized 0.2% yield stress. Care should be taken to ensure correct initial tensioning, with a torque wrench wherever possible.
Experience has shown that an utilization of 70% of the total load is reasonable average for the initial stressing force to allow additional forces in service to be taken up.