MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with a wide operating temperature range from -65 °C to 200 °C. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 9 shell sizes and 52 insert arrangements, they offer versatility for various applications. Utilizing M39029 rear release crimp contacts, they ensure reliable connections in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high-strength aluminum shells and available in different plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, these connectors meet rigorous standards. RoHS certified cadmium-free finishes are also available, making them environmentally friendly. Perfect for military and industrial use, these connectors provide durability, conductivity, and resistance to environmental factors.