MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert that provides environmental sealing. With an operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they ensure versatile installation. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating different contact sizes. Constructed with aluminum shells and offering multiple plating options, including RoHS certified finishes, they prioritize durability and compliance. These connectors, with bayonet coupling and gold-plated contacts, guarantee secure and high-quality electrical connections, making them ideal for military and industrial applications.