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 various configurations including front wall mount, rear wall mount, and jam nut receptacles, they offer reliable connectivity. These connectors are crafted with high-strength aluminum shells and come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts in multiple sizes. Plating options include light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, catering to diverse industry needs. With RoHS certified cadmium-free finishes available, they ensure compliance with environmental regulations. Suitable for military and industrial applications, MIL-DTL-38999 Series I connectors are known for their durability and performance in demanding settings.