This Duotight 8 mm (5/16") adapter is designed to suit the Nukatap Mini and will allow you to couple the faucet to a wide range of other 8 mm Duotight fittings. This includes attaching it to the Duotight Flow Control Ball Lock Disconnect. This particular type of flow control ball lock disconnect includes a "tang" at the top of the push in fitting that couples with this adapter. The combination of the two fittings prevents the faucet from spinning around while in use.