The MIL-DTL-38999 Series II connectors are designed for demanding environments, offering up to 128 contacts in a durable insert. With an operating temperature range of -65°C to 200°C, they provide reliable performance in extreme conditions. Featuring various mounting options, including front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility for different applications. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering multiple plating options, including cadmium-free finishes, these connectors ensure both durability and environmental compliance. Trusted for military applications, they meet stringent MIL-DTL-38999 II specifications, making them ideal for use in aerospace, defense, and other critical industries.