MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With an operating temperature range of -65 °C to 200 °C, these connectors are ideal for demanding applications. Available in various mount types such as front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. The connectors come in aluminum shells with options for plating including cadmium and electroless nickel, ensuring durability. Utilizing M39029 rear release crimp contacts, they provide reliable connectivity. Compliant with military specification MIL-DTL-38999 II, these circular receptacles are suitable for use in environments requiring high performance and environmental sealing.