The MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts in an insert and durable aluminum shells. With a wide operating temperature range of -65 °C to 200 °C, they offer reliable performance in harsh conditions. Available in various mounting styles such as front and rear wall mount, jam nut, and box mount receptacles, these connectors ensure secure and versatile connectivity. Utilizing M39029 rear release crimp contacts, they provide efficient signal transmission with options for gold plating. Offering RoHS certified finishes, including electroless nickel and cadmium-free coatings, they meet stringent environmental standards. Ideal for military and industrial applications, these connectors guarantee durability and longevity, with a service rating of I and mating life of 500 cycles.