The MIL-DTL-38999 Series I connectors feature up to 128 contacts within an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in front wall mount, rear wall mount, and jam nut receptacles, these connectors offer RFI grounding plugs and come in 9 shell sizes with 52 insert arrangements. Utilizing M39029 rear release crimp contacts in various sizes, including 22D, 22M, 22, 20, 16, and 8 (coax and twinax), they ensure secure connections. Constructed with high-strength aluminum shells and offering plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, these connectors are versatile in application. With RoHS-certified cadmium-free finishes available, they meet environmental standards.