This duotight 8mm (5/16") adaptor is designed to suit the Nukatap Mini and will allow you to couple your Nukatap mini to a wide range of other 8mm(5/16") duotight fittings or be able to attach 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 adaptor. The combination of the two fittings prevents the tap spinning around while in use.