Yeah, sorry about the delay...
I must have been confused with the metric used for something else...
I used (Lowes):
Button Head Cap Screws (Stainless)
Size 10-32 x 1/2
...and a good allen wrench to tighten down...
Hope that helps,
TRUCK: 2013 RAM 1500 Sport Reg Cab 4x4 w/6sp.