Concerns patterns for connectors which are for low power and may preferably be used with r.f. cables 96 IEC 50-1 or 50-2 of IEC Publication 196-2 Part 2. Explains the type designation and specifies ratings, preferred climatic categories, and dimensions.
IEC 60169-9:1978 history
1996IEC 60169-9:1978/AMD1:1996 Radio frequency connectors - Part 9: RF coaxial connectors with inner diameter of outer conductor 3 mm (0,12 in) with screw coupling - Characteristic impedance 50 ohms (type SMC); Amendment 1
1978IEC 60169-9:1978 Radio-frequency connectors. Part 9 : R.F. coaxial connectors with inner diameter of outer conductor 3 mm (0.12 in) with screw coupling - Characteristic impedance 50 ohms (Type SMC)