#1. 2.4 LITER. Mount bolt. PartQualifier: #1. A threaded rod with a drive head (such as hex, 12 point, torx, etc) on one end used to secure the Steering Gear Box or related components. Engine Mount Bolt. Manual Transmission Mount Bolt. Tow Hook Bolt. BRACKET. Engine. HEX FLANGE HEAD. Manual Transmission. Side. Steering Gear Box.