Parts such as the Carburetor (4): Packing,carbureto, Screw Set, Lever,cock, Choke Set are included in the Gx240\vxe_a\18ze20e8 Carburetor (4) parts fiche.
The Pan Screw 3x6 is the cheapest item from this partsfiche.
This CARBURETOR (4) assembly utilises two Pan Screw 3x6(s) - the highest specified component.