MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With front and rear wall mount options, jam nut, and box mount receptacles, they offer versatility in installation. These connectors are environmentally sealed, ensuring reliable performance in extreme conditions with an operating temperature range of -65 °C to 200 °C. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and various plating options, including RoHS certified finishes, they provide durability and protection against corrosion. The connectors are ideal for military and aerospace applications, meeting MIL-DTL-38999 II specifications for quality and performance.