A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Skid Plate. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Trans Oil Cooler Line. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Transmission Support. Automatic Transmission Mount Nut. Brake Master Cylinder Nut. Exhaust Manifold Nut. Frame Crossmember Nut. Fuel Tank Strap Nut. Manual Transmission Mount Nut. Nut that secures Suspension Stabilizer Bar Bracket. Part cannot be reused/reinstalled. Running Board Nut. Seat Belt Lap and Shoulder Belt Nut. Suspension Control Arm Nut. Vacuum Booster.