MIL-DTL-38999 Series I connectors feature a rugged design suitable for harsh environments, with up to 128 contacts housed in an insert. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. The high-strength aluminum shells come in different plating options, including cadmium-free finishes, ensuring durability and reliability. With options for front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, these connectors offer versatility for military and aerospace applications.