The 31-321 is a RF Connector, BNC series, BNC straight Clamp Jack with gold-plated brass contacts and crimp contact termination. Body made up of brass with nickel-plated finish and PTFE 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. The 50ohm BNC connector is miniature, lightweight units useable up to 11GHz and typically yield low reflection through 4GHz. Designed to accommodate a large variety of RG and industry standard cables. This RF connector is designed for Belden 8241, Belden 8263, Belden 8279, Belden 9209, RG-140, RG-210, RG-59, RG-59B and RG-62 cable.