MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65°C to 200°C, they offer reliable performance in extreme conditions. These connectors come in various configurations, including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. The aluminum shells can be plated with options such as electroless nickel and cadmium finishes, meeting stringent military specifications. Ideal for applications requiring durability and environmental resilience, these connectors ensure dependable connectivity in demanding settings.