ARP 5/16-24 x 2.250 black hex water pump pulley stud kit with a 1.000-inch fan spacer is a hardware kit that lists the stud diameter and length plus the specified spacer thickness. Supplied as the components named, the kit provides the studs and spacer dimensions for applications that require those exact measurements.
ARP 5/16-24 X 2.250 Black Hex Water Pump Pulley w/ 1.000in Fan Spacer Stud Kit