MIL-DTL-38999 Series I connectors are designed for rugged environments, with up to 128 contacts in an insert and a wide operating temperature range of -65 °C to 200 °C. These connectors come in various styles, including front wall mount, rear wall mount, and jam nut receptacles, all featuring RFI grounding plugs. With 9 shell sizes and 52 insert arrangements, they offer versatility in applications. Utilizing M39029 rear release crimp contacts, these connectors ensure secure connections. Made with high strength aluminum shells and available in different plating options such as gold, electroless nickel, and cadmium-free finishes, they meet diverse requirements. Ideal for military and industrial use, these connectors provide reliable performance in harsh conditions.