MIL-DTL-38999 Series II connectors feature up to 128 contacts, designed for harsh environments with a wide operating temperature range from -65 °C to 200 °C. These connectors come in various configurations including front and rear wall mount, jam nut, and box mount receptacles, with options for straight, RFI grounding, and standard plugs. With 52 insert arrangements and M39029 rear release crimp contacts, they offer versatility for different applications. Constructed with aluminum shells and available in multiple plating options, including RoHS certified finishes, they ensure reliable performance in demanding conditions. Suitable for military and aerospace applications, these connectors provide secure and efficient electrical connections.