MIL-DTL-38999 Series I connectors feature up to 128 contacts and are designed for harsh environments, with an operating temperature range from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer front and rear wall mount receptacles and jam nut receptacles, along with RFI grounding plugs. Constructed with high-strength aluminum shells, these connectors are offered with a choice of plating options, including cadmium-free finishes. They use M39029 rear release crimp contacts and are RoHS certified. Suitable for military and industrial applications, these circular connectors provide reliable performance in demanding conditions.