DodgeTail Light Grommet – (Part Number Not Available from O.E.M.) – Pick-Ups 1500 & 2500 Series 2006 – On • Screw Grommets: A variation of the nylon nut. They are used with metal tapping screws throughout the vehicle (interior and exterior). They’re installed in a pre-punched hole or slot in sheet metal. The tapping screw cuts it own thread as it’s installed.