Axle Studsss

Finished putting the rear end together yesterday and today I put the wheels on. Problem is when I tried to torque the lug nuts, they would not tighten up. Looks like the studs are turning in the axle shaft flange holes. Had three nuts out of ten torque down. Pulled the axles back out to change the studs. Just wondering if there is anything that I need to do to be sure the new studs fit properly so they don't turn in the holes?