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. This connector family includes front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs, available in 9 shell sizes and 52 insert arrangements. Utilizing M39029 rear release crimp contacts, they come in various sizes, including 22D, 22M, 22, 20, 16, and 8 for coax and twinax. Constructed with high-strength aluminum shells, they offer plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. RoHS certified cadmium-free finishes are also available, making them ideal for demanding applications.