MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts within an insert. With environmental sealing and an operating temperature range of -65 °C to 200 °C, these connectors ensure reliable performance in demanding conditions. Available in various receptacle styles such as front and rear wall mount, jam nut, and box mount, they offer versatility in installation. The connectors come in aluminum shells with options for plating, including cadmium-free finishes. Utilizing M39029 rear release crimp contacts, they guarantee secure connections. Suitable for military and industrial applications, these connectors provide durability and conductivity, with a mating life of 500 cycles.