MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts within an insert. These circular, environmentally sealed connectors have a wide operating temperature range from -65°C to 200°C. Available in various shell sizes and insert arrangements, they offer versatility for different applications. With front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide secure connectivity. Made with high-strength aluminum shells and offering multiple plating options including cadmium-free finishes, these connectors ensure durability and reliability. Suitable for military and industrial use, they meet MIL-DTL-38999 I specifications for performance and quality assurance.