John,

The lug studs sold at AutoZone, PEP Boys, etc are usually Dorman brand, the standard of the industry. Lug stud quality is not the problem. Are you buying the correct stud? Just because the thread is the same DOES NOT mean that the stud is correct. The diameter and length of the knurl is also very important.

Did you measure the hole in the wheels....see REM's message above.