MIL-DTL-38999 Series I connectors offer robust performance in harsh environments with up to 128 contacts housed in a sealed insert. Operating between -65 °C and 200 °C, these connectors come in various configurations including front and rear wall mount, as well as jam nut receptacles with RFI grounding plugs. Featuring 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts, ensuring reliable connectivity. Crafted from high strength aluminum, these connectors are available with different plating options such as cadmium, nickel, and anodized finishes. Their durable construction and RoHS compliant variants make them ideal for military and aerospace applications.