How many threads do you need to achieve rated tensile loading on the stud?
If you do not know the answer to that question you shouldn't comment.
The minimum engagement is the same as the diameter. If you have a 1/2" stud you need at least 1/2" engagement.
Looks to me like EVERY thread the wrong lug nuts engaged are damaged to some extent. The undamaged threads were not engaged by the lug nuts.
Questions is, how did they ALL get damaged like that.
Impact wrench.
Which is exactly why I do not use them in install lug nuts.
