Neutrik NBB75DFI Panel Jack BNC D-Style Feed-Through Isolated Nickel Finish Neutrik's BNC chassis connectors offer a true 75  design for serial and digital (HD) signals. Gold plated cage type center contact 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).