MIL-DTL-38999 Series I connectors feature up to 128 contacts and are designed for harsh environments with an operating temperature range of -65 °C to 200 °C. These connectors come in various configurations including front wall mount, rear wall mount, and jam nut receptacles, all offering RFI grounding. With 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in multiple sizes. Constructed with high strength aluminum shells, they are available in different plating options, such as cadmium-free finishes. Meeting military specification MIL-DTL-38999 I, these connectors are ideal for applications requiring durability and reliability in extreme conditions.