MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65 °C to 200 °C, they are ideal for demanding applications. These connectors come in various configurations, including front wall mount, rear wall mount, and jam nut receptacles, all offering RFI grounding options. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connectivity. Constructed with high-strength aluminum shells, they come with plating options such as cadmium and nickel for enhanced durability. RoHS compliant versions are also offered, making them suitable for diverse industrial and military uses.