AIR BAGS. Psngr air bag nut. A solid metal or plastic block with a threaded hole in the center which is used to secure the Instrument Panel Air Bag Inflator Module to its mounting point. A solid metal or plastic block with a threaded hole in the center which is used to secure the Seat Air Bag Inflator Module to its mounting point. Door Check Nut. and Washer Assembly -. arm. Door. Ft Seat. Housing. Instrument Panel. Psngr.