Parker Hannifin Corporation 3BF3-316 A-LOK Tube Back Ferrule

Parker Hannifin Corporation 3BF3-316 A-LOK Inch Tube Back Ferrule is the back ferrule component for Parker’s A-LOK tube-fitting system, designed for inch-size tubing. The 3BF3-316 designation identifies the ferrule variant used with A-LOK fittings, providing the seating surface behind the nut to secure the tube and contribute to a leak-tight connection in hydraulic and industrial fluid systems. This back ferrule is intended for inch-diameter tube applications within A-LOK assemblies, and it is used together with compatible A-LOK nuts and other ferrules to form a complete, robust junction. The part is specified for inch tubes and is compatible with Parker A-LOK fittings of the corresponding series, supporting reliable performance in applications requiring secure tube termination. When choosing parts for an A-LOK installation, confirm tube size matches the ferrule designation (inch tubes) and that the 3BF3-316 variant aligns with your A-LOK fitting series.