Single/Double Ferrule Fittings

Single/Double ferrule fittings are composed of four precision parts: body, nut, front and back ferrule. The addition of tubing makes it a five component upon installation. The two ferrules separate sealing and tube gripping functions. The front ferrule creates a seal against the fitting body and on the tubing outside diameter. As the nut is turned, the back ferrule compresses the front ferrule and forms an effective tube grip.