Steering lock bolt. A threaded rod with a drive head (such as hex, 12 point, torx, etc) on one end used to secure the Ignition Switch 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 Ignition Lock Cylinder Housing to a mounting point. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Ignition Lock Cylinder to it's mounting point. Steering Column Lock Bolt. Column. Cylinder. fracture. Housing. hsng. Safety. Mount bracket.