This is a replacement part for Taprite regulators or can be used in the process of building your own regulator. This is a CGA320 fitting with a left-hand threaded inlet nipple.
Specifications:
Aluminum CO2 Tank - 5 lb
Clear Vinyl Tubing - 3/8" ID
Ultraflex Tubing - 5/16" ID Gas Line
Bevlex Thick Wall Beverage Line - 3/16" ID by 7/16" OD