MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various shell sizes and insert arrangements, they offer versatility for different applications. These connectors come in high-strength aluminum shells with options for plating, including cadmium-free finishes. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, ensuring secure connectivity. Utilizing M39029 rear release crimp contacts, they offer reliable performance with gold plating for enhanced conductivity. Suitable for military and industrial use, these connectors meet MIL-DTL-38999 I specifications and provide 500 mating cycles, making them a durable and dependable choice for demanding environments.