The following list of torques apply for screws according to DIN 931/933 resp. ISO 4014/4017 in hardness classes 50, 70 and 80 at room temperature.
These torques should be seen as approximate guidelines because variations in friction values may occur in practice. To determine the correct torque for each application, we recommend you carry out an relevant trial turning.
Please note that the torques listed in the tables for the classes 70 and 80 apply only for a screw length up to 8 x the thread nominal diameter.