Did you strip the lug nut or the stud? If you stripped the lug nut, are you sure the stud is OK? Be sure and check so you don’t strip the new lug nut.
This next comment will likely start a debate but I always put a little anti-seize on each stud so this is less likely to happen. Keep it away from the tapered lug seat on the wheel, just the threads and buy a 1/2 inch torque wrench and a socket that fits your lug nuts.