The MIL-DTL-38999 Series II connectors are designed for harsh environments, offering reliable performance with up to 128 contacts in an insert. These environmentally sealed connectors feature a wide operating temperature range from -65 °C to 200 °C. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, they ensure versatile installation options. With 52 insert arrangements and M39029 rear release crimp contacts in multiple sizes, these connectors provide flexibility for different applications. Constructed with aluminum shells and offering various plating options such as electroless nickel and cadmium finishes, they meet stringent quality standards. Suitable for military and industrial use, these connectors guarantee durability and conductivity, making them essential for demanding environments.