The MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts in an insert with environmental sealing. Operating seamlessly between -65 °C and 200 °C, they offer reliable performance in extreme conditions. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, these connectors cater to diverse installation needs. With options for straight, RFI grounding, and standard plugs, along with 52 insert arrangements utilizing M39029 crimp contacts, they ensure versatile connectivity solutions. Crafted from durable aluminum with plating choices like cadmium and electroless nickel, they guarantee long-lasting durability. Compliant with military specifications, these connectors are ideal for demanding applications requiring high-performance electrical connections.