Standard threaded connectors use an axial compression seal and the integrity of the connection is totally dependent upon the installer. With the Ultra-Lock Connection System, performance and reliability is designed right into the connector! The unique radial seal design provides a reliable, operator independent, IP67/68/69K seal each and every time. There's no chance for under- or over-tightening. When you hear and feel the connector click, you know it's locked in – there's no guesswork.