Left.lower. Outer belt assy screw. PartQualifier: lower. Right.lower. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Seat Belt Pretensioner to its mounting surface. Seat Belt Lap and Shoulder Belt Bolt. Adjuster Adjust. AND Amplifier; retractor. Center Assembly retainer. Lap and Shoulder. Outer Assembly. Pan HEAD. Pretensioner. Included with: Tensioner.