MIL-DTL-38999 Series II connectors offer robust performance with up to 128 contacts, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they ensure versatile installation. With options for straight, RFI grounding, and standard plugs, alongside 52 insert arrangements, these connectors provide flexibility in connectivity. Utilizing M39029 rear release crimp contacts, they guarantee secure connections. The aluminum shells with diverse plating choices, including cadmium-free finishes, cater to different application needs. Ideal for military and industrial use, these connectors ensure reliable performance in demanding conditions.