They forgot to mention the alternative TNC, "Threaded Neil-Conselman". Same connector dimensions but the barrel is threaded and the cable connector screws on.

They forgot to mention the alternative TNC, "Threaded Neil-Conselman". Same connector dimensions but the barrel is threaded and the cable connector screws on. I mostly see them used on smaller RF gear like WiFi antennas, and whip antennas on hand held radios. The threaded design provides a more secure mechanical attachment. The classic blue Linksys routers and AP's use a reverse TNC connector for the antennas.