I can't find this anywhere, it's the brass fitting on the end of the stove side of the hose. It looks like 3/8" female with a pin in the center that looks like a tire valve. The fitting on the stove is male with a tiny hole offset to the side so that the valve is depressed when inserted. This opens the valve.
I need a longer hose but none I've seen have this type of connector. NO ONE does!
I need a longer hose but none I've seen have this type of connector. NO ONE does!