The connector style is BNC, HD, meaning the shell is physically compatible with standard BNC bayonet couplings but the dielectric and centre contact are sized for 75 Ohm line impedance. It carries a 18 GHz maximum frequency rating, which puts it above typical video-grade BNCs and into the range used for precision data links or high-bandwidth video distribution. The PTFE dielectric maintains stable impedance across that span, which matters for signal integrity at the upper end of the frequency band.
The shield termination is solder; the centre contact termination is also solder. The package includes 2 pieces: the connector body and the mounting nut, so you have everything needed for a single panel feed-through. The fastening type is bayonet lock — the standard BNC twist-and-lock coupling that gives a positive mechanical connection without tools. For field service, the 500 mating cycle rating means this jack can handle repeated reconnections on a test point or patch panel without the centre contact wearing out.