RS 50 Ohm BNC RF Coaxial Adapters. A range of 50 Ohm BNC RF coaxial adapters with bayonet couplings, nickel plated body and gold plated centre contact. Stock number ; 546-4926 546-4926 is an RF coax BNC adapter with a BNC socket to BNC socket (f-f) configuration Stock number ; 546-4932 546-4932 is an RF coax BNC Tee adapter with a BNC socket to BNC socket to BNC socket (f-f-f) configuration. Stock number ; 546-4948 546-4948 is an RF coax BNC Tee Adapter with a BNC socket to BNC socket to BNC plug (f-f-m) configuration. Stock number ; 878-2381 878-2381 is an RF coax BNC adapter with a BNC bulkhead jack to BNC plug (f-m) configuration suitable for a maximum panel thickness of 2.5mm