The MIL-DTL-38999 Series II connectors boast exceptional durability and versatility, with up to 128 contacts housed within a rugged insert for reliable performance in harsh environments. Engineered for military and aerospace applications, these connectors feature a wide operating temperature range of -65 °C to 200 °C, ensuring suitability for extreme conditions. Offering various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse installation needs. Available in 9 shell sizes and 52 insert arrangements, with M39029 rear release crimp contacts, they facilitate secure connections. Crafted from aluminum with multiple plating choices, such as gold and electroless nickel, these connectors prioritize corrosion resistance. Compliant with RoHS standards, they guarantee environmental sustainability. Suitable for back panel and box mounting, with a service rating of M and class E, these connectors excel in demanding applications requiring rugged and reliable performance.