Ball Lock Quick Disconnect - Gas In - Threaded

These aren't the cheap Chinese made disconnects.  This is a high-quality plastic quick disconnect made by CM Becker in Germany for your gas line.  Plastic quick disconnects for ball lock Cornelious-type kegs.

Grey quick disconnects are used for the gas in tank plug.

1/4 inch male flare (MFL) threaded fittings make it easy to connect a variety of hardware pieces and connectors. MFL fittings are more versatile than barbed fitting, but they must be tightened down properly or they can leak. Barbed fittings are also available.