Upper tie bar mount bolt. A threaded rod with a drive head (such as hex, 12 point, torx, etc) on one end used to secure the Headlamp Mounting Panel to it's Mounting point. Radiator Support Panel Bolt. Radiator Support Tie Bar Bolt. and LockWASHER. and LockWASHER Assembly - HEX. Center. Headlight Mounting Panel. Radiator Panel. REINFORCED. Screw.