MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering robust environmental sealing and a wide operating temperature range from -65 °C to 200 °C. Available in various configurations such as front and rear wall mount, as well as jam nut receptacles, they are designed for harsh environments. The connectors utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax options. Crafted with high-strength aluminum shells, they come with plating choices like electroless nickel and cadmium finishes, with RoHS compliant options available. Ideal for military and industrial applications, these connectors ensure reliable performance in demanding conditions.