TE Connectivity 50 Ohm RF Coaxial BNC Connectors - Bulkhead Crimp Jack 50 ohm RF coaxial BNC bulkhead rear panel mount crimp jack connectors with a nickel plated brass body and gold plated brass contact. These 50 ohm RF coaxial BNC bulkhead jack connectors have dual crimp terminations apart from stock numbers 680-7462 , 821-2484 and 821-2614 which have a hex crimp, and are suitable for use with a variety of RF coaxial cables. All BNC connectors are supplied with jam nut, lockwasher and gasket.