Stihl MS 192 T Manual page 8

Use the following procedure when refitting a DG screw in an existing thread:
Place the screw in the hole and rotate it anticlockwise until it drops down slightly.
Tighten the screw clockwise to the specified torque.
This procedure ensures that the screw engages properly in the existing thread and does not form a new thread
and weaken the assembly.
Screwdriver speed when used in plastic material: DG screws max. 500 rpm.
MS 192 T 7