MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, offering environmental sealing and a wide operating temperature range of -65°C to 200°C. These harsh environment connectors come in various configurations such as front and rear wall mount, jam nut, and box mount receptacles, with options for straight, RFI grounding, and standard plugs. Compliant with military specification MIL-DTL-38999 II, they utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Available in aluminum shells with plating options including cadmium and nickel, these connectors ensure reliable performance in demanding applications.