MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These connectors are environmentally sealed with an operating temperature range of -65 °C to 200 °C, making them suitable for a wide range of applications. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. The connectors come in high strength aluminum shells with options for plating, including cadmium-free finishes. With options for front wall mount, rear wall mount, and jam nut receptacles, they offer versatility in installation. Meeting military specification MIL-DTL-38999 I, these connectors ensure reliable performance in demanding conditions.