So the little ridge pattern doesn't matter? The ridge pattern on the old stud seemed to match the pattern on the wheel flange pretty well - kinda like it would 'lock' into place. The ridges on the new stud appear to be wider and don't seem like they would line up. I didn't try jamming them in there.
Haha. Agreed. Mine got stripped without an impact gun. Was just getting them started with a wrench. 40+ yr old steel I guess.