The Screw, Cross (3h5) is the cheapest item from this partsfiche.
This schematic depicts all components used in the Xg250 2005 4d61 Holland 1d4d6-300e1 Carburetor partslist.
Some items from this specific schematic: Wire, Sub Lead, Washer, Plain, Pilot Screw Set, Gasket, Float Chamber (nas).