56-. Bolt - 4Z. 56. A / C Compressor. Air Conditioning (A/C) Condenser Mount. that secures The Condenser Fan Motor Assembly to The Shroud. Engine Cooling Fan Shroud. Tapping Screw HEXAGON Head. A Threaded Rod with a Drive Head (such as Hex. 12 Point. torx. etc) on One End used to secure The Air Conditioning Condenser Fan Shroud to a Mounting Point.