That is the same connection on those little disposable bottles. I don't know what it is called but I bet if you searched for propane tank adapter hose you would find it.
Since there are several methods of hose to regulator connections the outlet is usually pipe. This might be a way to get to what you want. What type of gas cylinder are you using.
Thanks. OK, looks like it is 1" x 20 male throwaway connector (as in disposable bottles). Now if get a male quick-connect adapter for my 1/2 stub pipe and I am good to go... (Eliminating portable tanks).