MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in a sealed insert. With an operating temperature range from -65 °C to 200 °C, these connectors offer durability in extreme conditions. Available in various shell sizes and insert arrangements, they utilize rear release crimp contacts and come in high-strength aluminum shells with multiple plating options, including RoHS-certified finishes. The connector family includes front and rear wall mount, jam nut receptacles, and RFI grounding plugs, ensuring versatility for different applications. Meeting MIL-DTL-38999 I military specifications, these circular connectors provide reliable electrical connections for aerospace, defense, and other demanding industries.