MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in front and rear wall mount as well as jam nut receptacles, they offer RFI grounding plugs and M39029 rear release crimp contacts. With 9 shell sizes and 52 insert arrangements, these connectors ensure versatility. Constructed with high-strength aluminum shells and various plating options like gold and electroless nickel, they meet rigorous military specifications for reliable performance. The RoHS compliant cadmium-free finishes make them suitable for a wide range of applications requiring durability and conductivity.