CC-B is a 50 ohm male BNC connector. The center pin solders onto the core wire, providing a low-noise electrical connection. The outer crimp ferrule is sized for the shield and jacket of an RG174, RG316, or similar-size coaxial cable -- the maximum cable size which will fit this connector is about 3mm diameter. Cables with a diameter smaller than 2mm will need heatshrink added around the jacket to add to their diameter and make a secure mechanical connection when crimped.

There are two major BNC variants -- 50 ohm and 75 ohm. 50 ohm connectors are commonly used in professional audio, amateur (ham) radio, avionics, and on most electronic test equipment. 75 ohm connectors tend to be used in video and consumer-grade TV equipment.

BNC connectors are usable at frequencies up to around 2 GHz, and are prone to leakage above 4 GHz.

BNC is an acronym for Bayonet Neill-Concelman, after Paul Neill of Bell Labs (inventor of the N connector) and Amphenol engineer Carl Concelman (inventor of the C connector). BNC is often erroneously expanded to "Baby Neill-Concelman", "Baby N connector", "British Naval Connector", and "Bayonet Nut Connector".

This connector has a characteristic impedance of 50 ohms, and needs to be mated with 50 ohm coaxial cable in order to prevent signal loss, noise, and/or transmitter damage due to signal reflections at the point of mismatch. 50 ohm cable, connectors, and adapters are commonly used in wifi (802.11 wireless LAN) antennas, ham tranceivers, and other radio frequency (RF) analog and digital signaling, microwave, radar, hi-fidelity professional audio, non-destructive testing (NDT), oil and petroleum production, ultrasonic transducers, accelerometers, strain gauges, and some professional video applications.