The TE Connectivity 5413589-2 is a BNC plug with a male pin center contact, designed for 75 Ohm systems and terminated to RG-59, 59A, or 59B cable via crimp.
What's really failing here?
On a BNC that's been through a few hundred matings, the usual failure is the center pin losing spring tension or the bayonet slot wearing — not the cable crimp. The 500-cycle rating on this plug means it'll outlast most patch cables before the gold-on-brass contact starts to show intermittent signal loss. The nickel body finish resists corrosion in damp enclosures, but the real weak point on an older install is the crimp ferrule seating: if the braid wasn't fully captured, you'll see intermittent shield continuity at the connector end.
No official direct replacement is listed by TE Connectivity.
Signal and termination details
The 75 Ohm impedance is the defining spec — this is a video-grade BNC, not the 50 Ohm variant used in RF test equipment. Mating it with a 50 Ohm jack will cause a mismatch that reflects signal at the interface. The 2 GHz max frequency covers analog video (baseband to about 6 MHz) and digital SDI up to 3G-SDI comfortably, though the practical limit on RG-59 cable is usually cable loss, not the connector. The 0.15 dB insertion loss per mated pair is negligible in a typical video run.
Termination is all crimp — shield termination and contact termination both crimp, so you need a proper hex crimp tool for the RG-59 ferrule and a separate die for the center pin. The free-hanging (in-line) mounting means it's a cable-end connector, not panel-mount. If you're replacing a connector on an existing RG-59 run, this kit gives you the three pieces you need: the plug body with the bayonet coupling nut, the gold-plated brass pin, and the ferrule that captures the cable braid.