This part of IEC 61169, which is a sectional specification (SS), provides information and rules for the preparation of detail specifications (DS) for coaxial connectors with 9.5mm inner diameter of outer conductor and quick lock coupling mechanism, characteristic impedance 50 Ohms, its operating frequency is up to 8.5GHz. Series Q4.1-9.5 connector with socket centre contact is compatible with threaded 4.1-9.5 series (specified in IEC60169-11) connector with pin centre contact. This type connectors are start applied in telecommunication systems due to it’s special features are suitable for outdoor harsh requirements application such as quick and reliability coupling, compatible with threaded connector and entire waterproof. It specifies mating face dimensions for general purpose connectors – grade 2, dimensional details of standard test connectors-grade 0, gauges information and test requirements, product ratings and characteristics, tests selected from IEC 61169-1, applicable to all detail specifications relating to Q4.1-9.5 series RF coaxial connectors. In appendix A, it specifies the outline dimensions of connectors and protective sleeves, which could bring interchangeability between connectors pair and protective sleeve from different manufacturers. This specification indicates the recommended performance characteristics to be considered when writing a detail specification and it covers test schedules and inspection requirements for assessment levels M and H. NOTE – Metric dimensions are original dimensions. All undimensioned pictorial configurations are for reference purposes only.