MIL-DTL-38999 Series II connectors are designed for harsh environments with up to 128 contacts in an insert. These environmentally sealed connectors can operate in temperatures ranging from -65 °C to 200 °C. Featuring various mounting options including front wall mount, rear wall mount, and jam nut receptacles, they offer versatility for different applications. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts, ensuring reliable connections. Constructed with aluminum shells and offering multiple plating options, such as electroless nickel and cadmium olive drab, they meet stringent military specifications for durability. With RoHS compliant finishes, they guarantee environmental responsibility. Ideal for military and industrial use, these connectors provide secure and efficient electrical connections in challenging conditions.