The 97-3102A-20(621)(0850) is a standard cylindrical box receptacle connector designed for direct mounting on panels or chassis for open wiring. It features a solid backshell construction made from high-grade aluminum alloy with a black zinc alloy finish, as indicated by the (621) suffix. This connector has a shell size of 20 with a 1-1/4-18 threaded coupling and utilizes hard diallyl-phthalate dielectric inserts for its solder-type, silver-plated contacts. Designed for durability, it operates over a temperature range of –55°C to +125°C and features single key/keyway polarization to ensure proper mating. As a cost-effective and field-proven solution, it is intermateable with other 97 Series and SAE AS50151 connectors, making it suitable for various commercial applications including machine tools, robotics, and industrial equipment.