The MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in a rugged and 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. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connections. With a wide range of plating options including gold, electroless nickel, and cadmium finishes, these connectors ensure optimal conductivity and durability. Operating in temperatures ranging from -65 °C to 200 °C, they are suitable for demanding applications in military and industrial settings. The aluminum shells and RoHS compliant finishes make them ideal for environmental resistance and longevity, meeting the stringent requirements of MIL-DTL-38999 II specifications.