The MIL-DTL-38999 Series II connectors are designed for rugged environments with up to 128 contacts housed in an environmentally sealed insert. Operating efficiently in temperatures ranging from -65 °C to 200 °C, these connectors meet stringent military specifications. 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, they utilize gold-plated crimp contacts for reliable conductivity. Constructed with aluminum shells and offering RoHS compliant finish options, including electroless nickel and cadmium-free coatings, these connectors ensure durability and performance in demanding applications. Perfect for military, aerospace, and industrial use, they guarantee secure and efficient electrical connections.