Neoprene Coupling Washer
This washer/seal is needed between hex nuts and whatever the hex nut is attaching to. If you are missing this, for example, on the beer side of a coupler you will have a beer leak no matter how tight you make it. This washer/seal is specifically made to fit the standard hex nut.
Don’t hesitate to contact us if you have any questions about this or any other part we carry. We want to help you get your order right the first time and to keep your project underway.