The bulkhead connector offers a true 75 &#937; design for serial and digital (HD) signals . The machined brass connector body provides an extremely rugged and non-abrasive connection over long term use and is in addition recessed and therefore well protected in a D-shape housing (audio industry standard). <br /><br />Isolated bulkhead jack, feedthrough in black D-shape housing, protruding version (makes locking and unlocking of conventional BNC cable connectors easy)