MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating range of -65 °C to 200 °C. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility for different applications. With options for straight, RFI grounding, and standard plugs, these connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells and offering plating choices such as gold, electroless nickel, and cadmium-free finishes, they ensure reliable performance in diverse settings. Suitable for military and industrial use, these connectors meet MIL-DTL-38999 II specifications, providing rugged durability and environmental sealing for critical operations.