MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting options like front and rear wall mount, jam nut, and box mount receptacles, they offer versatility for different applications. With 52 insert arrangements and M39029 crimp contacts in multiple sizes, these connectors ensure reliable connectivity. Constructed with aluminum shells and plated with options like electroless nickel and cadmium, they meet stringent military specifications for durability. RoHS compliant finishes are available, making them suitable for a wide range of industries.