The 5413558-2: Rated to 2 GHz and 500 V, this is a 75 Ohm variant of the standard BNC — the impedance matters because 75 Ohm BNCs are used in video, broadcast, and telecommunications signal paths, not the 50 Ohm RF world of test equipment and radio.
At 2 GHz max frequency, this jack covers SDI video, baseband video, and lower-frequency telecom links. The 500 mating cycles mean the bayonet lock and center contact will hold up through regular reconnection in a patch panel or field-test setup, but it's not a high-cycle production interconnect.
The bayonet lock gives a positive mechanical mate without the rotation of a threaded connector, which is faster to engage in a rack or panel environment.
Lifecycle Reality — Obsolete, Sourced on RFQ
If you need a current-production 75 Ohm BNC jack, a parametric search for right-angle through-hole 75 Ohm BNCs with bayonet lock and solder termination will surface active alternatives, but no direct pin-compatible replacement is documented.