MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature various mounting options such as front and rear wall mount, jam nut, and box mount receptacles. With operating temperatures ranging from -65 °C to 200 °C, they ensure reliable performance in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells, they come in a range of plating options, including cadmium-free finishes for RoHS compliance. These connectors, suitable for military and industrial applications, guarantee durability and conductivity with their gold-plated contacts and electroless nickel coating.