ARP's factory-style replacement wheel studs are designed to press-fit into the original hole in the factory hub. If you are attemtping to utilize an aRP kit for another application, the hol should be checked to ensure it falls within the correct tolerance to allow for the proper amount of interference, so that the stud won't spin in the hole. For steel and cast iron ubsm the hole should be 0.006-0.016" smaller than the Knurl Diameter. For aluminum hubs, the hole should 0.010-0.016" smaller than the Knurl Diameter.

If the hole is larger than the tolerance listedforthe material, the the studs should not be used with that hub. The interference fot will nt be tight enough and the stud could spin in the hole.

All Arp wheel studs have an underhead radius. Each hole must be chamfered 0.025" to clear the under head radius and prevent stud failure.