The 2.92 mm connector is a microwave connector for the frequency range up to 46 GHz. Developed in the 1980s, the 2.92-mm connector is also known as the K connector, the designation used by Wiltron Corp, and the SMK connector.
The 2.92-mm connector has air as the dielectric, the diameter of the internal thread is 2.92 mm, and the outer diameter is 4.55 mm, as in other miniature microwave connectors. The 2.92-mm connector can be directly connected to the 3.5-mm and SMA connector. In order to connect the 2.92-mm connector without tools, it is available in special versions with an enlarged outer ring. It can withstand several thousand mating cycles without noticeable impairment of the transmission properties.
UT-141, which is mode-free up to 34 GHz, and UT-085, which can be used up to 60 GHz, are suitable as high-frequency cables.