This 2 part fitting is what is screwed into the end of most manual gas outlet service valves on refillable vapour gas tanks with a 1/4 female NPT thread in it. It allows the tank to be fitted with an on tank regulator or any universal 21.8LH pigtail hose. The fitting outlet is known as a butane nut type.
Its main thread to the tank is 1/4 NPT male and the hose end is 21.8LH (109 - butane nut).
High-quality Brass and whilst its made of 2 parts, it comes pre-assembled by us so all you need to do is screw it into the manual gas outlet.