Stainless steel quick disconnect.
Male QD to 1/2" MPT (male pipe thread).
The QD Quick Disconnects grips similar to a ball lock keg coupler.
Simply press the spring band on the female fitting and push in the male fitting.
When you release the band, the fittings locks together and seal against internal o-ring.
Can be used with hot or cold liquids up to 4 bar.