These easy to use garden hose quick connector couplings are really handy.
Having the 1/2inch thread makes them suitable for fitting your hoses to many of the home brew and brewery hardware that uses 1/2inch thread.
This particular fitting also has a washer in the seat so in most instances you will not need any teflon tape.
 
Specifications:
Brass Construction
Silicone o-ring (British Standard BS-111)
Fits most standard 1/2 inch garden hose quick couplings
1/2inch BSPP thread.  Will also couple with 1/2inch NPT
Includes rubber washer so no Teflon tape needed