MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, providing robust environmental sealing for harsh operating conditions. Designed for a wide temperature range from -65°C to 200°C, these connectors come in various configurations including front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells, they offer multiple plating options such as cadmium and nickel finishes. RoHS compliant versions are available, ensuring compatibility with modern regulations. Perfect for military and industrial applications, these connectors guarantee reliable performance in demanding environments.