Left.CONVERTIBLE. Right.CONVERTIBLE. Side trim panel nut. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the ABS Hydraulic Control Unit. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Fuel Tank Skid Plate. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Intercooler. Automatic Transmission Oil Cooler Nut. Battery Tray Nut. Brake Master Cylinder Nut. Bumper Impact Bar Nut. Fuel Filler Nut. Power Brake Booster Nut. Rear Body Panel Trim Panel Nut. Running Board Nut. TRunk Trim Panel Nut. Included with: Running Board.