MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a durable insert. Designed for harsh environments, these connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Featuring various mounting options including front and rear wall mount, as well as jam nut receptacles, they are versatile for different applications. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure reliable connections. The connectors, made with high-strength aluminum shells, come in different plating options such as cadmium and nickel, catering to specific requirements. RoHS compliant finishes are also available. Suitable for military and industrial use, these connectors provide efficient and durable electrical connections in demanding environments.