MIL-DTL-38999 Series II connectors are designed for harsh environments, with up to 128 contacts housed in an insert for secure connectivity. These connectors are environmentally sealed, ensuring reliable performance in extreme conditions with an operating temperature range of -65 °C to 200 °C. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. Featuring straight, RFI grounding, and standard plugs with a 90-degree cable clamp, they cater to diverse connection needs. With 9 shell sizes and 52 insert arrangements using M39029 rear release crimp contacts, these connectors provide flexibility for different applications. Constructed with aluminum shells and offering plating options such as cadmium and nickel, they meet stringent quality standards. Suitable for military and industrial use, these connectors ensure high performance and durability in demanding environments.