These studs are great! I had to modify the Crown Vic front hub for a cross member rebuild on a 65 F100. To run steel wheels with these hubs, you need THESE precision bolts and quality .75" aluminum spacers. I reamed the original bolt holes to .609" (39/64") which is within spec. Frost required. The landing was close. It was so tight that when I initially tried to pull the bolts in with the nut, the threads came loose from the nut when the bolt was only half installed. So don't do it. i made myβ¦