MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts housed in an insert for secure connectivity. With a wide operating temperature range of -65 °C to 200 °C, these connectors are ideal for demanding applications. Available in various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they offer flexibility in installation. The connectors come in aluminum shells with a choice of plating options including cadmium-free finishes, ensuring durability and environmental compliance. Utilizing M39029 rear release crimp contacts, they provide reliable connections for size 22D, 22M, 22, 20, 16, and 12 contact arrangements. Meeting MIL-DTL-38999 II military specifications, these circular receptacles are suitable for aerospace, defense, and other rugged environments where performance and reliability are paramount.