MIL-DTL-38999 Series II connectors are designed for harsh environments, with up to 128 contacts in an insert. These environmentally sealed connectors can withstand operating temperatures ranging from -65 °C to 200 °C. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering multiple plating options including electroless nickel and cadmium finishes, they ensure reliable performance. RoHS certified for environmental compliance, these connectors are ideal for demanding applications requiring rugged and durable connectivity.