Stud to fasten the air purifier in the carburetor.
Made just a little longer than stock to allow installing the Hi-Po air cleaner.
Fits most Autolite carburetors. Size: 4 1/8 inches length 1/4-20 X 5/16-18 threads
Lenght: 4-1/8"
Thread carburetor side: 5/16"-18
Thread lock/wingnut: 1/4"-20