Rated to 4 GHz, this covers the bulk of common RF work: test equipment, instrumentation, telecom baseband, and video distribution where you don't need the full 11 GHz of a precision BNC. The 4 GHz ceiling means it handles everything from DC through GPS, Wi-Fi bands, and most cellular frequencies without rolling off. The dielectric is polymethylpentene (PMP), a low-loss plastic that holds the impedance steady across the band.
This is the panel-mount jack half of a BNC pair. The bayonet lock engages with a twist; the front-side nut secures it through a panel cutout. The right-angle through-hole pins solder into the PCB, while the shield is terminated separately via solder to the body.