Water Pump Bolt Kit, 1965-1968 Small Block Chevy Engines, OEM TR Markings, Includes:, (3) 3/8 in.-16 x 1.750 UHL Bolts, (1) 3/8 in.-16 x 2.750 UHL Bolt, (1) 5/16 in.-24 Nut, (1) Tooth Washer|JEGS Water Pump Bolt Kit for 1965-1968 Small Block Chevrolet Engines.