The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These environmentally sealed connectors have a wide operating temperature range from -65 °C to 200 °C, ensuring reliable performance in extreme conditions. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they offer flexibility for different applications. With 52 insert arrangements and M39029 rear release crimp contacts, they provide secure and efficient connectivity. Constructed with aluminum shells and plated with options like electroless nickel and cadmium olive drab, they are durable and corrosion-resistant. Perfect for military and industrial use, these connectors meet stringent MIL-DTL-38999 II specifications, guaranteeing quality and performance.