The MIL-DTL-38999 Series II connectors feature up to 128 contacts in a sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various configurations such as front and rear wall mount, jam nut, and box mount receptacles, they offer versatility for different applications. With options for straight, RFI grounding, and standard plugs, these connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. Constructed with aluminum shells and offering plating choices including cadmium and nickel, they ensure reliable performance in demanding conditions. Meeting military specification MIL-DTL-38999 II, these connectors are ideal for use in aerospace, defense, and other rugged environments.