The 034-1121-12G is a high-density BNC straight plug connector designed for use with Belden 4694R cable, providing reliable RF connectivity across a wide frequency spectrum. It features a 75 ohm impedance with a frequency range of DC to 18 GHz, delivering return loss of 20 dB minimum from DC to 6 GHz and 15 dB minimum from 6 to 12 GHz. The connector is constructed with brass body and retaining ring with nickel plating, beryllium copper outer contact with nickel plating, phosphor bronze contact with gold plating, PTFE insulators, stainless steel passivated spring, and fluorosilicone gasket, ensuring durability and corrosion resistance. It meets rigorous environmental standards including thermal shock, vibration, shock, and salt corrosion testing per MIL-STD-202 methods, with a minimum durability rating of 500 mating cycles and operating temperature range of -30°C to +85°C. This connector is ideal for high-density RF applications requiring robust performance in demanding environments such as telecommunications, test equipment, and military systems.