M5 Allen Screw, 20mm in length. This screw is perfect for holding the carburetor float bowl to the carburetor body on the Rotax Max Dellorto VHSB carburetors.
Each screw is sold separately. The Rotax carburetor requires (4) total screws to hold the float bowl in place. Note also part #28, the lock washers, as a key part of this assembly.