It's part of TE's 5413-series BNC connectors, built around a zinc body with nickel finish and a Polymethylpentene (PMP) dielectric. The 1 GHz frequency ceiling and 500 V rating put it squarely in the baseband video, instrumentation, and telecom test-equipment slot — not the higher-frequency RF lab, but more than enough for surveillance cameras, oscilloscope front ends, and rack-mount patch panels.
The 50 Ohm impedance is the first thing to check — this jack mates with any standard 50 Ohm BNC plug (RG58, RG174, RG316 cable assemblies), but it will not match a 75 Ohm video system without an impedance mismatch. The 1 GHz bandwidth covers most digital video and instrumentation signals; if you need to push past 2 GHz, look at the 5414651-3 sibling which extends to 2 GHz. Mounting is via a bulkhead front-side nut with a right-angle solder termination — the jack sits flush against the panel face, and the right-angle tails route the signal trace parallel to the board edge. The centre contact is phosphor bronze with gold plating, good for the 500 mating cycles the spec calls out. That cycle count means this jack is meant for repeated connect/disconnect in test or maintenance roles, not a one-time factory install.