MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert for optimal connectivity. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. With various mounting options including front wall mount, rear wall mount, and jam nut receptacles, they provide versatility in installation. The connector family offers 52 insert arrangements with M39029 rear release crimp contacts, ensuring secure and reliable connections. Constructed with high strength aluminum shells and available in multiple plating options such as cadmium and electroless nickel, these connectors are durable and corrosion-resistant. Suitable for military and industrial applications, they meet MIL-DTL-38999 I specifications for performance and reliability.