MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various mounting options such as front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles, they cater to diverse installation needs. The connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering plating options like electroless nickel and cadmium finishes, they ensure durability and corrosion resistance. RoHS certified finishes are also available. Suitable for military applications, these connectors meet MIL-DTL-38999 II specifications, providing a high level of performance and reliability.