Review on Dorman 917 503 Hub Mounting Hardware by Fernando Ramani

These Dorman 917-503 bolts will not work on Kappa without modifications, although they were used on many other GM vehicles of the time. However, the product is just as good as it is in stock. Kappa platform = M12 1.75 45mm with 15mm head. This is = M12 1.75 50mm with 13mm head. tight. The shoulder is fine, wider than the standard. Proper torque of 87# can be applied provided you use 13mm air tool sockets (6 point is preferred over 12 point). If you have time, order and receive the correct screws from GM or NAPA for the vehicle in the header. As a last resort, you can still use them if you: Use a Dremel sanding disc and cut 3 strands. Then chamfer the edges for a clean thread engagement. Tighten lightly by hand, then loosen, remove material and inspect. Clean the threads and tighten from 60 ft/lb to 87 ft/lb. Check that the wheel spins freely. Check all other corners on Sky or Solstice, they may be loose or missing.