The 97-3100A-18(639)(0850) is a wall mount receptacle from the Amphenol 97 Series, designed for general duty, non-environmental applications. It features a size 18 solid shell made from high-grade aluminum alloy with a bright chromate over cadmium finish for durability. The connector utilizes a threaded coupling mechanism with a 1-1/8-18 thread and provides single key/keyway polarization. Designed for solder termination, its hard diallyl-phthalate inserts house non-rotating, silver-plated contacts, and it operates reliably in temperatures from -55°C to +125°C. As a cost-effective and field-proven solution, it is widely used in applications such as machine tools, robotics, and industrial machinery.