MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors offer durability and reliability in a variety of conditions. Available in multiple shell sizes and insert arrangements, they come in high-strength aluminum shells with options for plating such as electroless nickel and cadmium finishes. The connectors include receptacles for front wall mount, rear wall mount, and jam nut configurations, all meeting stringent military specifications for performance and reliability. Suitable for a range of applications, these connectors are RoHS compliant and ensure secure electrical connections in demanding environments.