The 97-3100A-16(0850) is a wall receptacle connector from Amphenol's 97 Series standard cylindrical connectors featuring solid shell construction with integral polarizing key and machined back shell threaded for standard MS/AN fittings. This medium to heavy weight connector is designed for durable, field-proven performance with non-rotating contacts and single key/keyway polarization. The connector operates reliably across a wide temperature range from -55°C to +125°C and supports up to 52 circuits with 128 different contact arrangements available. It is UL recognized (File E115497) and CSA certified (File LR69183), making it suitable for demanding industrial applications including aerospace, military, and equipment interconnection where robust, intermateable connectivity is required.