IEC 60169-27:1994 Radio-frequency connectors - Part 27: Radio-frequency coaxial connectors with screw coupling, typically for use in 75 ohms cable distribution systems (Type E)
Specifies radio-frequency coaxial connectors wich are typically for use in 75 ohms cable distribution systems with a variety of flexible cables, but which may also be used in both matched up to 3 GHz and unmatched applications.