MIL-DTL-38999 Series II connectors are designed for rugged environments, offering up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors are suitable for harsh conditions. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connections. Constructed with aluminum shells and offering plating options including cadmium and nickel, they ensure durability and corrosion resistance. Compliant with RoHS regulations, these connectors are ideal for military and industrial applications requiring high-performance connectivity in demanding environments.