MIL-DTL-38999 Series II connectors are designed for harsh environments, with up to 128 contacts housed in an environmentally sealed insert. Operating reliably in temperatures ranging from -65 °C to 200 °C, these connectors offer various mounting options including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they feature durable aluminum shells with plating options such as electroless nickel and cadmium finishes. These connectors, compliant with military specification MIL-DTL-38999, ensure secure and reliable connections in demanding applications.