Fuel Fitting Straight 5/16 Inch OD Tube. 1/2 Inch UNF Thread

Fuel Fitting Straight suits Holley 2 Barrel Carburettors and Strombergs. 5/16" OD tube. The double flared fitting provides a superior seal against the carburettor seat. A double flare is when the metal tube is bent over or doubled before being flared. Flaring the tube thins the metal which is why in this case double flaring is required to provide extra thickness to protect against cracking and a better seal against the carburettor seat.