This screws on the end of a beer shank in place of a faucet and features a 3/8" hose barb, so you can attach a hose and flush your shank with cleaning solution. Included rubber sealing washer to seal the nipple to the nut. Attach standard 3/8" interior diameter gas or beer tubing (see right). Also known as a faucet cleaning adapter.
This can be converted to a ¼" hose barb by purchasing item Q90 Shank Nipple Nut (not included).