MIL-DTL-38999 Series I connectors offer high-performance connectivity in harsh environments. With up to 128 contacts in each insert, these circular receptacles are designed for durability, featuring front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Their operating temperature range of -65 °C to 200 °C suits a variety of applications, while the 9 shell sizes and 52 insert arrangements provide flexibility. Constructed with high-strength aluminum shells and offered in various plating options, including RoHS-compliant finishes, these connectors ensure reliable performance in demanding conditions. Whether for military or industrial use, the MIL-DTL-38999 I series delivers rugged connectivity solutions with superior environmental sealing and conductivity.