MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with a wide operating temperature range of -65 °C to 200 °C. Offering front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, this connector family includes 9 shell sizes and 52 insert arrangements. Utilizing M39029 rear release crimp contacts, they come in various plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes available. Constructed with high-strength aluminum shells, they ensure durability and reliability in demanding applications.