MIL-DTL-38999 Series II connectors are designed for demanding environments, offering up to 128 contacts in a single insert. These connectors are fully sealed for environmental protection, with a wide operating temperature range from -65°C to 200°C. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, they feature a bayonet coupling for secure connections. Constructed with aluminum shells and plated with options such as gold and electroless nickel, they ensure reliable performance in harsh conditions. Compliant with military specification MIL-DTL-38999 II, these circular connectors are ideal for applications requiring rugged durability and high-performance connectivity.