PT Coupling Petroleum Handling Series TTF30NPTF Aluminum Cam and Groove Hose Fitting, Flange, 3" Flange x 3" NPT Female Suitable for connecting to hose that has NPT male end Flange at one end and NPT female threads at the other Aluminum for lighter weight and resistance to corrosion Suitable for use with water, hydraulic oil, coolants, gasoline, and petroleum products 100% Poured, Casted, and Machined in the U.S.A