The Screw,cross 4x6 is the most widely applied product in the CX500 1980 (A) GERMANY / 27PS FUEL TANK ( four times ).
This schematic depicts all components used in the Cx500 1980 (a) Germany / 27ps Fuel Tank partslist.
The component with the lowest price in the FUEL TANK schematic is the Screw,cross 4x6.