The MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with a wide operating temperature range from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer front and rear wall mount options, as well as jam nut receptacles for versatile installation. Utilizing M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax configurations, these connectors ensure reliable connectivity. Crafted from high-strength aluminum with a selection of plating options, such as electroless nickel and cadmium-free finishes, they meet RoHS compliance standards. The Series I connectors, with bayonet coupling and gold contact plating, are ideal for military and industrial applications requiring durability and performance in demanding conditions.