This part of IEC 61169 standardizes the interface and ratings of the type 1,0 r.f. connectors of 50 Ω impedance and having a screw coupling mechanism.
These connectors are recommended for use with semi-rigid and flexible cable and in microwave applications requiring high performance.
These connectors have an operating frequency range of up to 110 GHz.
IEC 61169-31:1999 history
1999IEC 61169-31:1999 Radio-frequency connectors - Part 31: RF coaxial connectors with inner diameter of outer conductor 1,0 mm (0,039 in) with screw coupling - Characteristic impedance 50 ohms (type 1,0)