MIL-DTL-38999 Series II connectors, featuring up to 128 contacts in an insert, are designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mount types including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. These connectors, compliant with military specification MIL-DTL-38999 II, come in aluminum shells with options for plating such as electroless nickel and cadmium finishes. Equipped with removable crimp contacts, they ensure reliable connectivity for demanding applications. With a service class rating of E and a mating life of 500 cycles, they are ideal for use in environments requiring durability and performance.