The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert and environmental sealing. Operating between -65 °C and 200 °C, they offer reliable performance in extreme conditions. Available in various mounting styles like front and rear wall mount, jam nut, and box mount receptacles, these connectors are versatile. With options for straight, RFI grounding, and standard plugs, they cater to different connectivity needs. Offered in 9 shell sizes and 52 insert arrangements, they utilize M39029 crimp contacts for secure connections. Made of aluminum, the connectors come with plating options including cadmium and nickel, with RoHS certified finishes available. Suitable for military and industrial applications, these connectors ensure durable and efficient electrical connections.