The component with the lowest price in the OIL PUMP/OIL PAN schematic is the Washer,plug Drain 14.
In this schematic the "Bolt,flange,6x32" is used most often.
Parts such as the Oil Pump/oil Pan: Packing,oil Strai (nas), Cartridge,oil Fil, Filter Set,oil, Bolt,flange,6x40 are included in the Cb500 1999 (x) France Oil Pump/oil Pan parts fiche.