MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range from -65 °C to 200 °C. Offering various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they ensure versatile connectivity. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and plated with options like electroless nickel, they guarantee durability. Meeting military specification MIL-DTL-38999 II, these circular plugs are ideal for applications requiring reliable performance in challenging conditions.