MIL-DTL-38999 Series II connectors boast up to 128 contacts in a sealed insert, designed for harsh environments with an operating range of -65°C to 200°C. Featuring various mounting options like front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in connectivity. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for reliable performance. Crafted from aluminum with plating options including cadmium and nickel, they ensure durability and corrosion resistance. RoHS compliant finishes cater to environmental considerations, making them ideal for diverse applications requiring secure and efficient electrical connections.