The MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in a sealed insert. Operating between -65 °C and 200 °C, they provide reliable performance in extreme conditions. Available in various mounting options, including front and rear wall mount, jam nut, and box mount receptacles, these connectors feature straight, RFI grounding, and standard plugs with a 90-degree cable clamp. With 9 shell sizes and 52 insert arrangements, they accommodate M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed from aluminum, with plating options such as cadmium and nickel, they ensure durability and conductivity. RoHS compliant finishes are also available. Suitable for military and industrial applications, these connectors offer reliable connectivity in demanding environments.