N Series Connectors Delta Electronics Mfg Corp N Series Connectors offer 50Ω impedance and 5/8'-24 threaded coupling. These medium-size connectors are ideal for use with cables ranging from 0.350' to 0.450' in diameter and available for flexible and semi-rigid cables with diameters from 0.085' to more than 1'. The N series is available with silver, nickel, or albaloy (tri-metal alloy) plating. Other features include DC to 11GHz frequency range, 1000VRMS voltage rating, 2500VRMS dielectric withstanding voltage, and 5000MΩ insulation resistance. Delta Electronics Mfg Corp N Series Connectors conform to MIL-PRF-39012 standards.