MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These connectors offer front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With an operating temperature range from -65 °C to 200 °C, they are ideal for rugged applications. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connections. The high-strength aluminum shells come in various plating options, including cadmium-free finishes for RoHS compliance. These connectors ensure environment-resistant performance, making them suitable for military and industrial use.