MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts within an insert and offering front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles. With operating temperatures ranging from -65 °C to 200 °C, these connectors provide reliable performance in extreme conditions. They come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts in various sizes. Constructed with aluminum shells and available in different plating options, including RoHS certified finishes, these connectors ensure durability and compliance with environmental standards. Perfect for military and industrial applications, they guarantee secure and efficient electrical connections.