MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert with front wall mount, rear wall mount, and jam nut receptacles. With an operating temperature range of -65 °C to 200 °C, these connectors are environmentally sealed for reliable performance. Utilizing M39029 rear release crimp contacts in various sizes, they ensure secure connections. Available in 9 shell sizes and 52 insert arrangements, they come in high-strength aluminum shells with options for plating, including RoHS certified cadmium-free finishes. These connectors, compliant with military specification MIL-DTL-38999 I, are ideal for demanding applications requiring durability and reliability.