MIL-DTL-38999 Series II connectors offer a robust solution with up to 128 contacts in an insert, designed for harsh environments. Featuring various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they ensure secure connections in demanding applications. These connectors, compliant with military specification MIL-DTL-38999 II, are constructed with aluminum shells and offer reliable performance in a wide temperature range from -65 °C to 200 °C. With multiple plating options available, such as gold, electroless nickel, and cadmium finishes, they cater to diverse industrial needs. The connectors utilize M39029 rear release crimp contacts, providing easy installation and maintenance. Suitable for military and aerospace applications, they guarantee durability with a mating life of 500 cycles. RoHS compliant options are also offered, making them environmentally friendly choices for critical operations.