Index Plate with Hardware Kit for use with RPS350-1, RPL/ RPA 450-1, RHL/ RHA 450-1 Base Assembly, Includes Hex Socket Shoulder Screw (1/4 x 1/2", 10-32), Flat Washer (3/8 x 11/16 x 1/16"), Flat Washer (1/4 x 3/8 x 1/16), Locknut (5/16-18), Flat Washer (5/16 x 5/8 x 1/16"), Index Plate Roller, Flat Washer (7/32 x 13/32 x 1/16), Nylon Lock Nut (10-32)