. 1000. COUPE. Fan assy nut. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Air Conditioning Condenser Fan Assembly. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Air Conditioning Condenser Fan Blade. Engine Cooling Fan Blade Nut. CONDITIONING Condenser Assembly. Engine Cooling. Included with: Fan assembly.