The MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, they 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, these connectors 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. The aluminum shells come with a choice of plating options, including cadmium-free finishes, meeting RoHS compliance standards. Ideal for military and industrial applications, these connectors provide durability, conductivity, and protection against environmental factors.