EN2® Weathertight Connectors Switchcraft EN2® Weathertight Connectors are sealed to IP68 NEMA 250 (6P), making them ideal for harsh environments. These connectors feature a patented grommet- and O-ring-free design, and copper alloy-plated contacts with thermoplastic housing. Switchcraft EN2 Weathertight Connectors are available with a standard or winged coupling ring as well as solder, crimp, or PC contact options. Ideal applications include marine, military, industrial, transportation, and more.