MIL-DTL-38999 Series II connectors are designed to withstand harsh environments with up to 128 contacts housed in an insert. These connectors are environmentally sealed, operating flawlessly in temperatures ranging from -65 °C to 200 °C. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts, ensuring secure connections. Crafted from durable aluminum, they come with plating options including electroless nickel and cadmium finishes. RoHS compliant versions are also offered for environmentally conscious applications. Perfect for military and industrial use, these connectors guarantee reliable performance in demanding settings.