MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert for secure connectivity. With a wide operating temperature range from -65 °C to 200 °C, these connectors are ideal for demanding applications. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. The connectors come in aluminum shells with plating options like electroless nickel and cadmium finishes, ensuring durability and corrosion resistance. Compliant with military specification MIL-DTL-38999 II, these circular receptacles with gold-plated contacts provide reliable performance, with a mating life of 500 cycles. Suitable for environment-resistant wall and jam nut mounting, they are suitable for a wide range of industrial and military applications.