MIL-DTL-38999 Series I connectors feature up to 128 contacts in environmentally sealed inserts, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Offering front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, these connectors come in 9 shell sizes and 52 insert arrangements. Utilizing M39029 rear release crimp contacts in various sizes, including coax and twinax, they ensure reliable connectivity. Constructed with high-strength aluminum shells and available in different plating options like cadmium and electroless nickel, they meet stringent military specifications. Suitable for applications requiring RoHS compliance, these connectors guarantee durability and performance in demanding environments.