Hello Mike,

Thank you very much for the information... The one detail I was trying to find also is the width of the knurled area...I believe that the chart mentions the length of the knurled area but not the width... If you were to drill new holes for installation, how much would you have to go under size 1/32?

The closest that I can find is from Napa, NOE 6411295, but I don't know if the wheel bolt knurled diameter of 0.654" is the same as the original... Another possible choice and closer to the original GM 3683850 is found below...

http://www.mirageinc.com/press-in-wheel-stud-916-18

https://www.napaonline.com/en/p/NDP6411295

Last edited by Philipj; 04/21/2019 2:09 PM.
Philippe Jeanneau