MIL-DTL-38999 Series I connectors feature up to 128 contacts within a sealed insert, designed for harsh environments with an operating temperature range from -65 °C to 200 °C. Offering front wall mount, rear wall mount, and jam nut receptacles, these connectors are crucial for military and aerospace applications. With 9 shell sizes and 52 insert arrangements available, they utilize M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, they come in plating options including cadmium-free finishes, ensuring durability and reliability. Ideal for applications requiring environmental resistance, these connectors meet stringent military specifications.