Left.REAR SEAT CODE: 3ND. lower. Outer belt assy screw. PartQualifier: lower. Right.REAR SEAT CODE: 3ND. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Seat Belt Shoulder Belt to it's mounting point. Seat Belt Lap and Shoulder Belt Bolt. Seat Belt Receptacle Bolt.