M83723/88H12128 is a circular electrical connector receptacle designed for environment-resistant applications in military systems. It features a flange mount configuration with threaded coupling and solder pin contacts, conforming to MIL-DTL-83723/88E specification. The connector is available in multiple shell sizes (8 through 24) with Series III design and supports Classes H, J, L, N, P, and Y. It incorporates a fused vitreous insulator, resilient seal construction, and optional seal barriers for enhanced environmental protection. The connector mates with MIL-DTL-83723/86, /91, /95, and /97 plugs and is widely used in aerospace, defense, and industrial applications requiring reliable electrical connections in harsh environments.