Parts such as the Crankcase: Plug, Gasket (nas), Bolt 1, Bolt, Small Flange are included in the Xp500 2004 5vu1 Greece 1c5vu-300e2 Crankcase parts fiche.
The component with the lowest price in the CRANKCASE schematic is the Bolt, Small Flange.
On this parts fiche the Bolt, Small Flange is the most specified component.