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. This range includes various receptacle options such as front and rear wall mount, jam nut, and box mount, suitable for different applications. The connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Offering superior durability, they are constructed with aluminum shells and are available in different plating options including cadmium-free finishes. These connectors, compliant with MIL-DTL-38999 II specifications, ensure reliable performance in demanding conditions.