Is the fastening torque different for the concave nut and the convex nut?
Basically, as the convex nut is for fastening, tighten it to your own specified value and then tighten the concave nut (lock nut) with the recommended amount of torque. In the case that you want to employ the same torque value for both concave and convex nuts, please consult with t Hard Lock Industry directly.