MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an insert, boasting environmental sealing and a wide operating temperature range from -65°C to 200°C. Featuring front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs, this connector family is versatile. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes, including coax and twinax. Constructed with durable high-strength aluminum shells and offering multiple plating options, such as electroless nickel and cadmium finishes, these connectors ensure reliable performance in harsh environments. RoHS compliant options are also available, meeting modern environmental standards. Perfect for military and industrial applications, these connectors are designed for demanding environments, providing secure and efficient electrical connections.