MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 52 insert arrangements and M39029 rear release crimp contacts in various sizes, they provide versatility for different applications. Constructed with high-strength aluminum shells and available in different plating options, including cadmium-free finishes, they ensure durability and reliability. Ideal for military and industrial use, these connectors have a wide operating temperature range from -65 °C to 200 °C, making them suitable for demanding conditions.