The 202103 is a BNC Terminator Plug is made of brass with nickel-plated finish 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. The 50R BNC connector is miniature and lightweight units. Designed to accommodate a large variety of RG and industry standard cables.