MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. The connectors come in high-strength aluminum shells with plating options including cadmium-free finishes. Offering front wall mount, rear wall mount, and jam nut receptacles, they are ideal for military and aerospace applications requiring rugged and dependable connectivity.