MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With front wall mount, rear wall mount, jam nut, and box mount receptacles, they offer versatile installation options. These connectors, with a wide operating temperature range of -65 °C to 200 °C, are environmentally sealed for reliable performance. Available in various shell sizes and insert arrangements, they use M39029 rear release crimp contacts. Constructed with aluminum shells and offering plating options such as electroless nickel and cadmium finishes, they ensure durability. Suitable for military and industrial applications, these connectors provide secure and efficient electrical connections.