Left.GT4. Right.GT4. Upper mount nut. W/GT4 RS. W/O SPYDER RS. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Battery Cable. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Engine Coolant Expansion Tank. Automatic Transmission Mount Nut. Manual Transmission Mount Nut. Nut that fastens the door hinge to the vehicle. Part cannot be reused/reinstalled. Suspension Shock Absorber Mount Nut. Suspension Strut Mount Nut.