The 211839-1 is a standard sex, Series 1 Circular Plastic Connector (CPC) configured as a square flange receptacle for panel or chassis mounting. It features a shell size of 23 with a 24-position insert arrangement (23-24) and standard 'A' keying. This receptacle is designed to accept pin contacts and comes equipped with four 4-40 threaded inserts for secure mounting. Constructed from UL 94V-0 rated, heat-resistant thermoplastic, it offers quick connect/disconnect capability with a positive detent coupling. With an operating temperature range of -40°C to +105°C, this lightweight connector is ideal for commercial signal and low-current power applications.