MIL-DTL-38999 Series I connectors are designed for rugged environments, featuring up to 128 contacts housed in a sealed insert. Operating efficiently in temperatures ranging from -65 °C to 200 °C, these connectors offer reliable performance. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts. With options for RoHS-compliant finishes and plating in cadmium-free and traditional coatings, including gold and electroless nickel, they ensure durability and conductivity. The connectors come in high-strength aluminum shells, with variants for front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs. Suitable for military and industrial applications, they meet MIL-DTL-38999 I specifications for performance and reliability in harsh environments.