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 connectors, compliant with military specification MIL-DTL-38999 II, offer various mounting options including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offered in different plating options, such as cadmium and nickel, these connectors ensure reliable performance in demanding applications. RoHS certified finishes are also available, making them suitable for diverse industrial settings.