The 50 Ohm impedance and 4 GHz frequency ceiling define the signal path — this is a standard BNC for video, RF test, and telecom up to 4 GHz, not a high-frequency SMA or N-type. The 500 mating cycles are typical for a bayonet-style BNC; the silver-plated centre contact handles the duty but will show wear sooner than a gold-plated part if cycled daily in a test lab.
Construction and included hardware
The lockwasher prevents the nut from backing off under vibration — critical for a bulkhead mount where the connector sees cable strain.