Do not over tighten the set screw. Maximum torque is 1 - 2 Nm (0.74-1.47 ft-lb).
Tightening torque for the piston rod nut is 50 Nm (37 ft-lb). Use the manufacturers recommended torque settings for installation of the strut and all other fasteners that attach the suspensions to the vehicle.
Tightening torque for piston rod nut is 25 Nm (18 ft-lb).