The Screw, With Washer is the lowest priced item on this Carburetor schematic.
A sample from the products for the Carburetor include: Screw, Pan, Plunger, Starter, Plug, Drain, Jet, Pilot (# 32.5).
The Carburetor assembly is constructed from several parts from which the Carburetor Assy 1 is the most expensive.