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 ideal for demanding applications. Available in various mounting styles such as front wall mount, rear wall mount, and jam nut receptacles, they offer flexibility in installation. The connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts for reliable connections. Constructed with aluminum shells and offered in different plating options including electroless nickel and cadmium finishes, they ensure durability and corrosion resistance. Perfect for military and industrial use, these connectors meet MIL-DTL-38999 II specifications and are suitable for environments requiring rugged performance.