MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a rugged insert design. These environmentally sealed connectors are built to withstand extreme temperatures ranging from -65°C to 200°C, making them ideal for harsh environments. Featuring front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide versatile installation options. With 9 shell sizes and 52 insert arrangements available, these connectors accommodate various contact configurations, including M39029 rear release crimp contacts. Constructed with high strength aluminum shells and offered in multiple plating options such as electroless nickel and cadmium finishes, they ensure reliable performance in demanding applications. RoHS compliant versions are also available. Suitable for military, aerospace, and industrial use, MIL-DTL-38999 Series I connectors are designed for durability and long-lasting connectivity.