The MIL-DTL-38999 Series II connectors feature up to 128 contacts, offering robust connectivity in harsh environments with their environmental sealing and wide operating temperature range of -65 °C to 200 °C. Available in various mounting styles such as front and rear wall mount, jam nut, and box mount receptacles, they ensure versatile installation options. With 52 insert arrangements and M39029 rear release crimp contacts, these connectors provide reliable performance. Constructed with aluminum shells and plated in options like electroless nickel and cadmium finishes, they meet stringent military specifications for durability. Suitable for demanding applications, these circular connectors guarantee secure and efficient electrical connections.