BKL Electrical SMA Adaptors/Connectors to SMA Connector/Adaptors/Couplers/Socket – BKL 409072, The SMA Connector to SMA Connector Adaptor is a standard SMA (Sub-Miniature-A) male to SMA male is used mainly for applications in the frequency ranges 1GHz to 18/26.5 GHz (depending upon the design). The plug connector is considered as male and the socket as female, depending upon the design of the inner conductor as metallic pin or as metallic pipe. It has a high mechanical strength owing to the screw lock (8mm). BKL 409072 SMA Adaptor SMA Plug to SMA Plug