The 5-1634503-3: It carries a single port, female socket interface, and is rated to 2 GHz — the 75 Ohm impedance makes it a fit for video distribution, broadcast, and broadband data systems rather than the 50 Ohm RF test bench.
The 2 GHz maximum frequency at 75 Ohm defines the usable bandwidth for composite video, SDI, and broadband RF distribution. The 75 Ohm characteristic impedance is the standard for video and cable-TV infrastructure — mating this jack with a 50 Ohm cable or connector will create a mismatch that degrades return loss and signal integrity.