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. Available in various shell sizes and insert arrangements, they offer front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs. Utilizing M39029 rear release crimp contacts, including sizes 22D, 22M, 22, 20, 16, and 8 (coax and twinax), these connectors ensure secure connections. Constructed with high-strength aluminum shells, they come in different plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. Meeting MIL-DTL-38999 I military specifications, these connectors are reliable for demanding applications.