MIL-DTL-38999 Series I connectors offer exceptional performance in 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 come in various configurations including front wall mount, rear wall mount, and jam nut receptacles. Compliant with military specification MIL-DTL-38999 I, they ensure reliable connectivity in demanding applications. The connectors are available in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts in different sizes. Constructed with high-strength aluminum shells, they are offered with various plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. These connectors, with RoHS-certified cadmium-free finishes, are designed for rugged environments, making them ideal for military and industrial use.