1000. Housing assy screw. A Screw that is used to secure the HVAC Case 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 Evaporator Case 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 HVAC Case to its mounting surface. Instrument Panel Air Duct Screw. Air Conditioning (A/C) Evaporator Core Bolt. Air inlet Assembly. Collar. HEX HEAD. Housing Assembly. HVAC Unit Bolt. Instrument Panel Air Duct. Mount Bolt. Retainer. Seal kit Bolt.