This part of IEC 61169, which is a Sectional Specification (SS), provides information and rules for the preparation of Detail Specifications (DS) for pin and socket R.F. coaxial connectors, with screw coupling mechanism, for low to medium power applications. The connector is commonly known as the "type N". Three versions of the 50 Ω characteristic impedance type N connector are included, each version being mateable with each of the others. The general purpose connector (grade 2) derived from the specifications MIL-C17B and MILC-39012 may preferably be used with R.F. cable 60096 IEC 50-7 up to about 12 GHz maximum frequency.