("CC") 9/16" opening (H/D Trucks) Applications Control arm shaft mounting bolts up to 9/16" diameter, including 1/2 ton - 1 ton Chevrolet/ GMC trucks, HD service. #47776 Thickness 1/16" Qty: 50, 47777 Thickness 1/8" Qty: 50, 47778 Thickness 3/16" Qty: 25.