MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These environmentally sealed connectors operate in temperatures ranging from -65 °C to 200 °C, ensuring reliable performance. Available in various mounting styles such as front wall mount, rear wall mount, jam nut, and rear/front box mount receptacles, they offer versatility in installation. With options for straight, RFI grounding, and standard plugs, as well as a range of shell sizes and insert arrangements, they accommodate diverse connectivity needs. The connectors, made of aluminum, come with plating options including light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, meeting RoHS compliance standards. Suitable for military and industrial applications, these connectors guarantee durability and high performance in demanding environments.