MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an insert. Featuring various mounting options like front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installations. These connectors, with a wide operating temperature range of -65 °C to 200 °C, ensure reliable performance in extreme conditions. Made of aluminum, they come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. With plating options including electroless nickel and cadmium finishes, they meet stringent military specifications for durability. Perfect for applications requiring high reliability, these connectors are suitable for use in aerospace, defense, and industrial settings.