Oil tank chrome 1/4 BSP female to female, plated brass ball valve with 5/16 inch throat for oil line to prevent wet sumping. Screws directly onto Norton post 1946 oil tank or add spigot adaptors to insert in the oil line. Includes a bright orange lock-out tag to wrap aroung the advance retard lever on British singles to remind you to turn on the tap. Norton removed oil taps from approx 1933+. I have oil taps on all of my singles with manual advance retard.Original Part Number:
