MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These circular receptacles, with various mounting options, are ideal for military and aerospace applications. Operating between -65 °C and 200 °C, they offer reliable performance in extreme conditions. Made of high-strength aluminum, they come in multiple plating options, including RoHS-certified finishes. With M39029 rear release crimp contacts, they ensure secure connections. The range of shell sizes and insert arrangements, along with RFI grounding plugs, provide versatility for different setups. Whether for front or rear wall mount or jam nut receptacles, these connectors deliver durability and conductivity, meeting stringent military specifications for performance and reliability.