MIL-DTL-38999 Series II connectors offer high performance in harsh environments, with up to 128 contacts housed in a rugged insert. Designed for durability, they are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installation. The connectors feature aluminum shells with a selection of plating options, including electroless nickel and cadmium finishes. Utilizing M39029 rear release crimp contacts, they ensure reliable connections. With a service class rating of M and RoHS compliance, these connectors are ideal for military and industrial applications requiring robust performance.