MIL-DTL-38999 Series I connectors with up to 128 contacts are designed for harsh environments, featuring front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes. These connectors, made of high-strength aluminum, offer versatility with plating options like cadmium and nickel. With an operating temperature range from -65°C to 200°C, they ensure reliable performance in demanding conditions. RoHS compliant finishes are also available, making them ideal for a range of applications.