MIL-DTL-38999 Series I connectors, designed for harsh environments, feature up to 128 contacts in an insert with front wall mount, rear wall mount, and jam nut receptacles. Operating between -65 °C and 200 °C, they offer reliability in extreme conditions. Utilizing M39029 rear release crimp contacts, these connectors come in 9 shell sizes and 52 insert arrangements, accommodating various needs. Constructed with high strength aluminum shells and available in different plating options like electroless nickel and black anodized aluminum, they ensure durability. With RoHS certified cadmium-free finishes, these connectors are environmentally friendly. Ideal for military specifications, they guarantee a secure and conductive connection with their gold-plated removable crimp contacts. The bayonet coupling and N keyway polarization enhance ease of use, while their environment-resistant design makes them suitable for demanding applications.