Bnc female twist-on connector, rg59 the bnc twist-on connector connects an rg-59 coaxial cable to a bnc connection port.Providing a firm loss-less connection, it allows you to quickly connect and disconnect using a twist-on type coupling.Nickel-plated brass/zinc construction no special tools required suitable for video and headend applications connects an rg-59 coaxial cable to a bnc connection port gold plated contact pin reduces signal loss