BNC Plug for RG-58 — What This Connector Does
The 1-5221128-0: It ships as a 3-piece kit: the connector body, the centre contact, and the ferrule, so you have everything to complete one termination. The 0.2 dB insertion loss at rated frequency is typical for a crimp-style BNC at this price point — the signal penalty is low enough that it won't eat your link budget in a short cable run.
Cable Fit and Termination — RG-58 Only, Crimp It
This plug is built for the RG-58 cable group — RG-58, 58A, 58B, 58C. The included ferrule compresses over the braid; the centre pin crimps onto the signal conductor.
Obsolete — Sourcing the 1-5221128-0 Today
The 1-5221128-0 is listed as obsolete.
What It Won't Do — Cable and Compatibility Limits
This plug is designed for the RG-58 cable group only. It is not compatible with RG-59 or RG-6 — the dielectric diameters and impedance differ, and the crimp ferrule will not fit. The bayonet lock is not a threaded coupling — it will not hold against the same vibration or pull force as an N-type or TNC connector.