MIL-DTL-38999 Series I connectors offer high-performance connectivity in harsh environments, featuring up to 128 contacts housed within a durable insert. These circular receptacles, available in various shell sizes and insert arrangements, are designed for front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. Operating reliably in temperatures ranging from -65 °C to 200 °C, they ensure secure and efficient electrical connections. Constructed with high-strength aluminum shells and offered in different plating options, including RoHS-certified finishes, these connectors guarantee long-term durability and performance. Suitable for military and industrial applications, they meet stringent MIL-DTL-38999 I specifications for environmental resistance and reliability.