Historical
IEC 60169-24 Ed. 1.0 b:1991
Radio-frequency connectors - Part 24: Radio-frequency coaxial connectors with screw coupling, typically for use in 75 ohm cable distribution systems (Type F)
Specifies radio-frequency coaxial connectors which are typically for use in 75 ohm cable distribution systems with a variety of flexible cable, but which may also be used in both matched and unmatched applications.
International Electrotechnical Commission [iec]
