Left.REGULAR CAB. Rear bracket bolt. Right.REGULAR CAB. STEP BAR. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Skid Plate to it's mounting point. Running Board Bolt. and Washer Assembly. and Washer Assembly - HEX. HEAD. Powertrain Skid. Running Board. Support bracket. Under cover.