MIL-DTL-38999 Series II connectors feature up to 128 contacts sealed for harsh environments, with an operating temperature range of -65 °C to 200 °C. These connectors offer various mounting options, including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells, they come in plating options like cadmium, nickel, and anodized finishes. The straight plug design, with options for RFI grounding, suits diverse applications. Meeting MIL-DTL-38999 II specifications, these connectors ensure reliable performance in demanding environments.