The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors offer reliability in extreme conditions. Available in various mounting options including front and rear wall mount, as well as jam nut receptacles, they ensure secure connections. Utilizing M39029 rear release crimp contacts, they come in 9 shell sizes and 52 insert arrangements, suitable for diverse applications. Constructed with high strength aluminum shells and offering plating options like electroless nickel and cadmium finishes, they meet stringent military specifications. RoHS certified options are also available, catering to environmental compliance requirements. Perfect for demanding environments, these connectors provide durability, conductivity, and ingress protection for critical electrical connections.