The 031-221-RFX is a BNC straight Bulkhead Jack with gold-plated phosphor bronze contacts, nickel-plated zinc die-cast body and a Delrin insulator. The BNC is a bayonet style connector allowing for quick connect and disconnect with a positive locking mechanism. Mating is achieved with just a quarter turn of the coupling nut. Designed to accommodate a large variety of RG and industry standard cables. This 50Ω miniature BNC connector is designed for RG58, RG59, RG179 and RG316 cable.