The MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature front and rear wall mount options, as well as jam nut receptacles with RFI grounding plugs. With a wide operating temperature range from -65°C to 200°C, they provide reliable performance in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells and various plating options including cadmium and nickel, these connectors ensure durability and conductivity. Suitable for military and industrial applications, they meet MIL-DTL-38999 I specifications for quality and performance.