The Screw-washer,5x16 is the lowest priced item on this Carburetor schematic.
The sub assemblies and components that make up this Carburetor include this Carburetor Assy., L., the most expensive part.
Some items from this specific schematic: Screw Set, Carburetor Assy., L., Holder,needle Jet, Screw-washer,6x16.