Some items from this specific schematic: Bolt(6x20), Bolt, Gasket(6.4x11.5x0.8) (nas), Lever,fuel Cock (purple).
The sub assemblies and components that make up this Fuel Cock include this Cock Assembly,fuel, the most expensive part.
The lowest price component in this Fuel Cock parts-list fiche is the Bolt(6x20).