The 112951-11: The 75 Ohm impedance marks this as the BNC variant for video, CATV, and telecom signal paths — not the 50 Ohm version used in RF test equipment. Rated to 6 GHz with 0.2 dB insertion loss, it covers the full digital video band and legacy telecom carrier frequencies.
This plug is listed for AT&T 734, 734A, and Belden 1505A cable groups — all 75 Ohm, solid-dielectric types typical in broadcast and telecom runs. The nickel-plated brass body resists corrosion in outdoor or industrial cabinet environments.
The bayonet lock does not wear the centre contact on engagement — the coupling nut takes the axial load. For installations that see daily reconnection, the 500-cycle rating gives a comfortable margin before the gold flash begins to show wear.