Carrier bolt. Rear. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Spare Tire Carrier to it's mounting point. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Spring Damper to it's mounting point. Used to secure the Suspension Shock Absorber Bumper to it's mounting point. Bracket. Coil Spring Damper. Jounce. Spare Tire. Stop.