MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts housed in an insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors are suitable for rugged applications. Various mounting options are available, including front and rear wall mount, jam nut, and box mount receptacles. The connectors come in aluminum shells with multiple plating options, such as cadmium and electroless nickel, catering to different environmental requirements. Utilizing M39029 rear release crimp contacts, they ensure reliable connections. RoHS compliant finishes are offered, making them environmentally friendly. Ideal for military and aerospace applications, these connectors provide durability and performance in demanding conditions.