The 226601-3: It is a single-port, panel-mount connector with a flange mounting feature and threaded fastening, making it suited for fixed installations where a secure, vibration-resistant RF connection is needed.
The 2 GHz frequency ceiling sets the usable band — this connector handles VHF and UHF bands comfortably but will show increasing loss above that. The 500 mating cycles are a solid figure for a threaded connector — the nickel-plated zinc shell and tin-plated phosphor bronze centre contact hold up well under repeated field mate/unmate cycles. The solder cup termination requires hand-soldering the centre conductor and shield; no crimp tool needed.
The 226601-3 is listed as obsolete.