MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. These environmentally sealed connectors come in various configurations including front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Compliant with military specification MIL-DTL-38999 I, they offer high strength aluminum shells with options for plating such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. With 52 insert arrangements available, they utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8 for optimal connectivity. These connectors, offering RoHS certified cadmium-free finishes, are ideal for demanding applications that require reliable performance in challenging conditions.