Reply to "Tighten rear axle nuts with a “torque multiplier”?"

FWIW, the more desirable full-height axle nuts (both left and right hand threads)  may be partially split horizontally. This allows the upper and lower parts of the nut to distort slightly in one or more planes during tightening, so as to provide an integral locking function. Whether this distortion returns perfectly upon nut removal is not known. If not, re-use of the nut may mean much higher run-on torque and a lower holding power than what the nut originally delivered for a given torque. In spite of their cost, the safe move is to not reuse such nuts. I don't know what SAE grade any of the available nuts are, either. A pure guess is gr-5.