Bkl sma adaptors sma and rp sma gold plated contacts gold or nickel finish bkl 0409056 bkl electronics 0409056 the hf adaptor sma coupler to smb coupler is a standard sma sub miniature version a coupler often used for antenna connections on wlan devices bkl 0409056 sma adaptor sma female to smb socket inline gold plated