MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding plugs and utilize M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells and offered with multiple plating options including cadmium-free finishes, these connectors are suitable for diverse applications requiring durability and reliability.