MIL-DTL-38999 Series II connectors are engineered for rugged environments, housing up to 128 contacts in a sealed insert. With a wide operating temperature range of -65 °C to 200 °C, they offer reliable performance in extreme conditions. Featuring various mounting options including front and rear wall mount, jam nut, and box mount receptacles, these connectors provide versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering multiple plating options, including RoHS certified finishes, these connectors ensure durability and compliance with industry standards. Ideal for military and industrial applications, they guarantee high conductivity and environmental resistance, with a service rating of I for optimal performance.