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 fully environmentally sealed, ensuring reliable performance in extreme conditions. Operating within a wide temperature range from -65°C to 200°C, they are suitable for a variety of applications. Available in various mounting options including front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles, these connectors offer versatility in installation. The plugs come in straight, RFI grounding, and standard configurations with a 90-degree cable clamp, catering to different needs. With 9 shell sizes and 52 insert arrangements, they accommodate diverse contact requirements, utilizing M39029 rear release crimp contacts in various sizes. Constructed with aluminum shells and offering multiple plating options such as electroless nickel and black anodized aluminum, these connectors provide durability and corrosion resistance. Whether for military, aerospace, or industrial use, the MIL-DTL-38999 Series II connectors are a reliable choice for demanding environments. (Word count: 153)