H338 rubber hose fittings are designed to be used with H338 rubber airbrake hose. Male straight swivel fittings feature a hose connector on one end and swiveling male pipe thread on the other for theading into internally threaded mating parts. The swivel allows the fitting to turn without unthreading, great for high stress or load situations. They come with either the same size hose/pipe or alternating sizes depending on the application. They are designed to resist pull-out, are highly corrosion resistant, and have a maximum working pressure of up to 225 PSI.