The 31-10-75: This impedance variant targets video distribution, CCTV, baseband SDI, and telecom signal paths where the 75 Ohm characteristic is standard — distinct from the 50 Ohm BNC common in RF test equipment. The connector carries a 4 GHz frequency maximum and a 0.2 dB insertion loss, meaning it passes baseband video and digital SDI signals with minimal amplitude loss through the mated pair. The bayonet lock (BNC) provides a quarter-turn mate that is faster than threaded connectors and audibly clicks when fully engaged.
The body is nickel-plated brass; the housing colour is silver and white. Termination is solder cup — the centre contact and shield are soldered to the coaxial cable centre conductor and braid. The isolated feature indicates the connector body is electrically isolated from the panel ground — important in installations where ground loops between equipment racks must be avoided. The single-port design is standard for a cable-entry bulkhead jack.