Sma connectors for 50ohm cable coupling bkl 409089 sma plug connecters are used mainly for applications in the frequency ranges 1 ghz to 18265 ghz depending upon the design the plug connectors are considered as male and the socket as female depending upon the design of the inner conductor they have a high mechanical strength owing to the screw lock 8 mm bkl 409089 sma coupling for crimping 50 ohm cable rg 58u gold plated