Part Number: 13900 SCH13900. 19mm 12pt 1/2" drive flair nut socket designed for Cummins ISB Fuel Lines. 22mm 12pt 1/2" drive flair nut socket designed for Cummins ISX Fuel Lines. This tool is designed to easily torque the lines correctly, reducing if not eliminating, the possibility of a fuel leak or damaging the fuel line, fuel rail, or fittings.
