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. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure reliable connections. Constructed with aluminum shells and plated with options like gold and electroless nickel, they guarantee durability. Meeting military specification MIL-DTL-38999 II, these circular connectors are ideal for applications requiring rugged performance in demanding conditions.