PT Coupling 6039250025DFH Aluminum Cam and Groove Hose Fitting, Coupler with EPDM NH Thread Gasket and Buna N Cam Gasket, Stainless Steel 300(HBS) Cam Arms, 2-1/2" Coupler x Female Fire Hose (NH) Suitable for coupling to NH male end of fire hose Coupler at one end and NH female fire hose threads at the other Aluminum for lighter weight and resistance to corrosion 300 stainless steel cam arms for resistance to corrosion Suitable for use with water, hydraulic oil, coolants, gasoline, and petroleum products