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 from -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, they come with M39029 rear release crimp contacts for secure connections. The high-strength aluminum shells come in different plating options, including cadmium-free finishes. The connectors, with front wall mount, rear wall mount, and jam nut receptacles, meet military specification MIL-DTL-38999 I and are suitable for demanding applications that require durability and reliability.