The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert with environmental sealing. Operating between -65 °C and 200 °C, these connectors are suitable for a wide range of applications. Available in various mounting styles like front wall mount and rear box mount, they offer versatility in installation. With options for straight, RFI grounding, and standard plugs, as well as different shell sizes and insert arrangements, these connectors provide flexibility in connectivity. Constructed with aluminum shells and offering plating options including gold, electroless nickel, and cadmium finishes, they ensure reliable performance. Meeting military specification MIL-DTL-38999 II, these circular receptacles are ideal for demanding environments where durability and performance are essential.