The MIL-DTL-38999 Series II connectors are designed for harsh environments, with up to 128 contacts housed in an insert. Offering front and rear wall mount options, as well as jam nut and box mount receptacles, these connectors are versatile. With operating temperatures ranging from -65 °C to 200 °C, they are suitable for a wide range of applications. Featuring RoHS certified cadmium-free finishes and utilizing M39029 rear release crimp contacts, these connectors ensure reliable performance. Available in aluminum shells with various plating options, including gold, olive drab cadmium, electroless nickel, and black anodized aluminum, they provide both durability and conductivity. The Series II connectors are ideal for military and industrial use, with a service rating of I and ingress protection for environmental resistance.