The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With front wall mount, rear wall mount, and jam nut receptacles, they offer versatility in installation. Operating at temperatures ranging from -65°C to 200°C, these connectors are environmentally sealed for reliable performance. They come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells, they are available in various plating options including cadmium and nickel finishes. RoHS certified options are also available, ensuring compliance with environmental regulations. Perfect for military and industrial applications, these connectors provide durability and conductivity in demanding settings.