The component with the lowest price in the CRANKCASE COVER (1) schematic is the Washer,plain,6mm.
Parts such as the Crankcase Cover (1): Pin,gov.weight, Bolt,flange,8x35, Cap,oil Filler, Weight Governor are included in the Gx240\rh\18ze20e8 Crankcase Cover (1) parts fiche.
With seven applications this Bolt,flange,8x35 is the most specified part.