Bumper cover nut. W/O TRAILHAWK. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Fuel Door. Fender Liner Nut. Mud Flap Nut. Nut to secure bumper cover. Quarter Panel Splash Shield Nut. Radiator Support Splash Shield Nut. Rocker Panel Molding Nut. Side Body Trim Protector Nut. Wheel Arch Flare Nut. Wheel Arch Molding Nut.