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 wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. Constructed with high-strength aluminum shells, these connectors come in RoHS-certified finishes such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. Utilizing M39029 rear release crimp contacts, they ensure reliable connections with options for coax and twinax contacts. Suitable for military and industrial applications, these connectors meet MIL-DTL-38999 I specifications for durability and performance in demanding conditions.