MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts and environmental sealing for reliable performance. With an operating temperature range of -65 °C to 200 °C, these connectors offer durability in extreme conditions. Available in various mount types such as front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility for different applications. The connectors come in aluminum shells with options for plating finishes including gold, electroless nickel, and cadmium-free coatings. Utilizing M39029 rear release crimp contacts, they ensure secure connections. Meeting military specification MIL-DTL-38999 II, these circular connectors are ideal for demanding industrial and military environments.