MIL-DTL-38999 Series II connectors offer high-performance connectivity in harsh environments, featuring up to 128 contacts within a rugged insert. Designed for durability, these connectors are environmentally sealed and can operate in temperatures ranging from -65°C to 200°C. With various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they provide versatile solutions for different applications. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts for secure connections. Crafted from aluminum, they come in plating options including cadmium and nickel, with RoHS-compliant finishes available. Suitable for military and industrial use, these connectors ensure reliability with their gold-plated contacts, meeting stringent performance standards with a service rating of M. Whether for box or through bulkhead mounting, they guarantee conductivity and ingress protection, making them ideal for demanding environments.