The 10-820053-28S is an Amphenol 97 Series standard cylindrical connector designed for general duty, low-cost applications. It features a size 28 shell with threaded coupling and utilizes the 28-21 insert arrangement, which provides 37 size 16 socket contacts. This solder-termination connector is constructed with a high-grade aluminum alloy shell, diallyl-phthalate inserts, and silver-plated contacts, ensuring reliable performance from -55°C to +125°C. As part of a versatile, UL-recognized series, it is commonly used in factory automation, robotics, machine tools, and welding equipment.