Head air bag nut. Left.MEGA CAB. Right.MEGA CAB. A solid metal or plastic block with a threaded hole in the center which is used to secure the Curtain Air Bag Inflator Module to its mounting point. Body A-Pillar Trim Panel Nut. Door Mirror Nut. Nut used to secure the luggage carrier side rail. Roof Rack Nut. Body A - Pillar Trim Panel. Curtain Air Bag. Door Mirror. Head Air Bag. Mount bRacket retainer. Rivet. Roof Luggage Carrier Side Rail. Windshield Trim.