The MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, they feature front and rear wall mount options, along with jam nut receptacles and RFI grounding plugs. These circular connectors, compliant with military specification MIL-DTL-38999 I, are built for durability, with a wide operating temperature range from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for reliable connections. Constructed with high strength aluminum shells and offering multiple plating options, including RoHS certified finishes, these connectors ensure optimal performance in demanding applications.