The 034-1109-12G is an HD-BNC straight bulkhead jack-to-jack adapter designed for high-frequency RF and microwave signal transmission. It features a 75 ohm impedance with a frequency range of DC to 18 GHz, supporting return loss specifications of -20 dB maximum from DC to 6 GHz and -15 dB maximum from 6 to 12 GHz. The adapter is constructed with brass bodies and lock washers with nickel plating, beryllium copper contacts with gold plating, and PTFE insulators, ensuring excellent electrical performance and durability. It is rated for 500 mechanical cycles minimum and operates reliably across a temperature range of -65°C to +165°C. This adapter is ideal for laboratory test equipment, RF instrumentation, and communication systems requiring reliable, low-loss connections in demanding environments.