This is the 75 Ohm variant of the Greenpar series — the impedance is the key differentiator from the more common 50 Ohm BNCs, making this the correct choice for video distribution, CCTV, baseband telecom, and instrumentation signal paths where 75 Ohm characteristic impedance is required. The connector ships as a kit: one jack, one lockwasher, one nut, and one solder tag — everything needed for a rear-side-nut bulkhead install in one package.
The 75 Ohm impedance is not negotiable — if your cable or system is 50 Ohm, this jack will create a mismatch that reflects signal. The 500 V rating and 2 GHz max frequency define the operating envelope: this is a moderate-voltage, moderate-frequency BNC suited for video and instrumentation duty, not high-power RF transmission. The 500 mating cycles mean the silver-plated brass centre contact and body will hold up through repeated patch-panel reconnections or test-equipment use — silver plating gives good conductivity but tarnishes over time in corrosive environments; for those, a gold-plated BNC is the better call.
No official second-source cross-reference is on record, though the 415420-1 is a same-series peer with the same package and active status — confirm the impedance and hardware complement before substituting.