MIL-DTL-38999 Series I connectors offer high-performance connectivity solutions in harsh environments. With up to 128 contacts housed in a rugged insert, these connectors are designed for durability. Featuring front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide versatility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells and various plating options, including cadmium-free finishes, they ensure reliable performance. Operating in extreme temperatures ranging from -65 °C to 200 °C, these connectors are ideal for military and aerospace applications requiring environmental resilience.