MIL-DTL-38999 Series I connectors feature up to 128 contacts within an insert and are designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. These connectors, crafted from high-strength aluminum, offer front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. Plating options include light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS-certified cadmium-free finishes available. The connector family, compliant with MIL-DTL-38999 I specifications, ensures reliable performance in demanding applications requiring box mounting receptacles.