D38999/20WJ35SN is a MIL-DTL-38999 Series III wall mount receptacle designed for military and aerospace applications. It features an aluminum shell with olive drab cadmium over electroless nickel base finish (Class W), shell size J, and insert arrangement 35 with socket contacts. The connector utilizes normal (N) polarization keying for proper mating alignment. Each connector is furnished with contacts including spare contacts and sealing plugs, along with insertion/extraction tools for each contact size. This connector is ideal for demanding military and aerospace environments requiring reliable, high-performance interconnect solutions.