The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors are environmentally sealed for reliable performance. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. The connectors come in aluminum shells with options for plating such as cadmium and nickel, meeting RoHS compliance standards. Utilizing M39029 rear release crimp contacts, they ensure secure and durable connections. Suitable for military and industrial applications, these connectors are known for their rugged construction and high mating cycles.