MIL-DTL-38999 Series II connectors feature up to 128 contacts, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. These environmentally sealed connectors come in various configurations including front and rear wall mount, jam nut, and box mount receptacles. Offering versatility, they are available as straight, RFI grounding, and standard plugs with 90-degree cable clamps. With 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts, ensuring secure connections. Made of aluminum with plating options such as cadmium and nickel, these connectors meet RoHS compliance standards, suitable for military and industrial applications requiring reliable performance in challenging conditions.