What Style & Knurl for Disc Brake Wheel Studs?

[fenderman33]

I'm trying to order longer wheel studs for the front of a '72 Dart with BBP '73 Discs, but I'm having trouble finding out what size I need. They're 1/2"-20 studs stock length at the moment and I'm looking to get about 3/4" longer to work with the Bullit wheels. Can anyone tell me what size knurl these should be?
Thanks,
Jon

 

[340butterduster]

The knurl diameter will be will be standard to the stud/thread, doesn't make any difference what length stud.
Are you re-drilling the holes?
Most automotive parts store will have those.

But for reference the knurl dia. on a 1/2-20 stud is .620" to .630"