The MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an insert with environmental sealing. Operating between -65 °C and 200 °C, these connectors are versatile and durable. Available in various mount types including front and rear wall mount, jam nut, and box mount receptacles, they cater to different installation needs. With straight, RFI grounding, and standard plug options, as well as 52 insert arrangements, these connectors provide flexibility in design. Made of aluminum, they come with plating options such as cadmium and nickel, ensuring reliable performance. Meeting MIL-DTL-38999 II standards, they are ideal for military and aerospace applications.