MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts within an insert. With a wide operating temperature range of -65°C to 200°C, these connectors are suitable for demanding applications. Available in various configurations like front and rear wall mount, jam nut, and box mount receptacles, they offer flexibility in installation. The connectors come in aluminum shells with options for plating, including cadmium-free finishes for RoHS compliance. Utilizing M39029 rear release crimp contacts, they ensure reliable connections. Meeting military specification MIL-DTL-38999 II, these circular receptacles are ideal for aerospace, defense, and industrial use, providing durability and performance in challenging environments.