The 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. Offering front wall mount, rear wall mount, and jam nut receptacles, they ensure secure connections. Utilizing M39029 rear release crimp contacts in various sizes, including coax and twinax, these connectors come in 9 shell sizes and 52 insert arrangements. Constructed with high-strength aluminum shells and available in different plating options like cadmium and nickel, they guarantee durability and reliable performance. Meeting military specifications, these connectors are ideal for demanding applications requiring rugged and dependable connectivity.