MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts housed in an insert for secure connectivity. With environmental sealing and a wide operating temperature range of -65 °C to 200 °C, these connectors ensure reliable performance in demanding conditions. Available in various configurations like front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. The aluminum shells come in different plating options, including cadmium-free finishes, meeting RoHS certification. Utilizing M39029 rear release crimp contacts, these connectors are durable and efficient, making them ideal for military and aerospace applications.