Lock housing screw. A screw that is used to secure the Ignition Lock Cylinder Housing to it's mounting point. A screw used to secure the Steering Column Lock 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 to it's mounting point. Steering Column Lock Bolt. Column. TORX. Ignition Cylinder. Ignition Housing.