MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an insert for reliable connectivity. These connectors are environmentally sealed and operate efficiently in temperatures ranging from -65°C to 200°C. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in different sizes. Crafted with aluminum shells, they come with plating options including cadmium and electroless nickel, ensuring durability. With RoHS certified finishes, they meet environmental standards while delivering high performance. Compliant with military specification MIL-DTL-38999 II, these connectors are ideal for demanding applications.