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 front and rear wall mount options, as well as jam nut receptacles, they provide versatile installation possibilities. With 9 shell sizes and 52 insert arrangements available, these connectors accommodate various contact types, including M39029 rear release crimp contacts. Constructed with high-strength aluminum shells and offered in multiple plating options, such as electroless nickel and black anodized aluminum, they ensure reliable performance in demanding applications. RoHS compliant finishes are also available, catering to environmental regulations. Ideal for military and industrial use, MIL-DTL-38999 Series I connectors guarantee secure and efficient electrical connections in even the harshest conditions.