MIL-DTL-38999 Series II connectors, designed for rugged environments, feature up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, they offer reliable performance in extreme conditions. These connectors come in various configurations, including front and rear wall mount, jam nut, and box mount receptacles, with options for straight, RFI grounding, and 90-degree cable clamp plugs. Available in 9 shell sizes and 52 insert arrangements, they utilize rear release crimp contacts for easy installation. Constructed with aluminum shells and offering multiple plating options, such as cadmium-free finishes, they ensure durability and compliance with RoHS standards. Ideal for military and industrial applications, these connectors provide secure and efficient electrical connections in harsh environments.