TE Connectivity 50 Ohm MCX RF Connector - Professional Grade PCB Socket. 50 Ohm Professional Grade MCX RF coax PCB sockets with PTFE dielectric and gold plated brass body. Stock number ; 512-0935 512-0935 is SMT mount with a 6 x 6mm flange Stock number ; 680-7447 680-7447 is right angle through hole mounting with a 5.70 x 5.70mm flange Stock number ; 512-0941 512-0941 is straight through hole mounting with a 5.70 x 5.70mm flange