Bkl sma adaptors sma and rp sma gold plated contacts gold or nickel finish bkl 0419111 bkl electronics 0419111 this is an inline adaptor with a male reverse polarity sma connector to a female sma socket gold plated brass body with gold plated contacts reverse polarity sma refers to the mechanical arrangment rather than the electrical signals the reverse male connector has a socket instead of a central pin but still has an internal thread bkl 0419111 sma adaptor sma reverse male to sma fem