CM Becker Ball Lock Disconnect Beverage Out - Flare
This black, beverage out quick disconnect comes with a flare for attaching to a beverage line, and it's made by CM Becker so you know it is high quality.
The flare threads measure 1/4 inch.
Note: Sometimes ball lock fittings can be difficult to get fully seated on a Cornelius keg. It's recommend to use a quick spray of sanitizer solution to act as a lubricant and giving it a few twists while applying the ball lock.