MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert with environmental sealing. Operating between -65 °C and 200 °C, they offer versatility in various applications. Available in multiple configurations including front and rear wall mount, jam nut, and box mount receptacles, these connectors ensure secure and reliable connections. With options for straight, RFI grounding, and standard plugs, along with various shell sizes and insert arrangements, they accommodate diverse needs. Constructed with aluminum shells and offering plating choices such as cadmium-free finishes, these connectors prioritize durability and performance. Suitable for military and industrial use, they meet stringent quality standards for conductivity, ingress protection, and service life.