I'll have to look at the size of the stud. You are right about being threaded or self tapping not sure which as the dodge dealer/Mech told me they were pressed in so I went to bone yard for new ones. That OTC press works wonderfully,lol. Man I hope the guy that advised me on these ball joints was right I hate to add anymore problems. never even dawned on me about the stud diameter seemed tight will look for sure thanks for pointing that out.