MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in a sealed insert with an operating temperature range from -65 °C to 200 °C. These connectors, available in various mount types such as front and rear wall mount, jam nut, and more, offer versatility in installation. With options like straight, RFI grounding, and 90-degree cable clamp plugs, they cater to diverse connectivity needs. Made of durable aluminum with plating choices including gold and electroless nickel, they ensure reliable performance. Meeting military specification MIL-DTL-38999 II, these circular plugs guarantee high-quality electrical connections for demanding applications.