MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. These thin-walled connectors come in various mounting options like front and rear wall mount, jam nut, and box mount receptacles, with straight or 90-degree cable clamp plugs. Compliant with military specification MIL-DTL-38999 II, they utilize M39029 rear release crimp contacts and are available in 9 shell sizes and 52 insert arrangements. Constructed with aluminum shells and offering plating options including cadmium-free finishes, these connectors ensure reliable performance in rugged conditions, making them ideal for a range of applications requiring secure electrical connections.