The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With a wide 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, and jam nut receptacles, they provide flexibility for different applications. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts in multiple sizes. Constructed with aluminum shells and offering plating options including cadmium and electroless nickel, they ensure durability and corrosion resistance. Ideal for military and industrial use, these connectors meet MIL-DTL-38999 II specifications, guaranteeing high quality and reliability.