Make sure that mechanical fuel pumps stay properly aligned by using ARP’s durable black oxide finished chrome moly or rust-proof stainless bolts (both materials are rated at 170,000 psi and considerably stronger than Grade 8 hardware). Your choice of either conventional hex heads or 12-point head. Washers are included. PartNumber : arp430-1601 Description : Fuel Pump Bolt Kit; 12Point Nut Material : Stainless Steel Engine Components::Hardware Kits - Other