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. Available in various shell sizes and insert arrangements, they offer front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors ensure secure connections with sizes 22D, 22M, 22, 20, 16, and 8. Crafted from high-strength aluminum, they come in plating options like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, catering to diverse needs. RoHS certified finishes are also available, making them environmentally compliant choices for critical applications.