ARP Water Pump Bolts are available in both polished stainless steel or black oxide finish chrome moly. You also can choose between standard hex head bolts or compact 12-point fasteners. Also available as part of ARP’s complete Engine & Accessory kits. PartNumber : arp430-6802 Description : Water Pump Pulley Bolts; Pro Series; 12Point Head; 4Pieces Socket : 3/8 Thread : 5/16-24 UHL : 0.75 Engine Components::Hardware Kits - Other