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 wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding plugs and utilize M39029 rear release crimp contacts. With 9 shell sizes and 52 insert arrangements, these connectors are versatile and reliable. Constructed with high-strength aluminum shells and various plating options including cadmium-free finishes, they meet rigorous military specifications for performance and durability. Perfect for applications requiring secure and robust electrical connections, these connectors are essential for demanding environments.