EN3 26AWG Circular Connectors Switchcraft EN3™ 26AWG Circular Connectors are harsh environment connectors with nine to 18 crimp contacts and a strain-relief system. The EN3 series offers easy, no soldering connector wiring and a secure cable clamp system that accommodates cable diameters from 0.230' to 0.380'. The heavier boot seals cable diameters up to 0.380'. Switchcraft EN3 connectors seal up to IP68 and feature gold-plated standard contacts to ensure reliability as well as a patented grommet and O-ring-free design.