The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in a sealed insert. With an operating temperature range of -65°C to 200°C, these connectors offer reliability in extreme conditions. Available in various shell sizes and insert arrangements, they use M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells and offering multiple plating options, including cadmium-free finishes, they ensure durability and performance. The connectors, including front wall mount, rear wall mount, and jam nut receptacles, are MIL-DTL-38999 I compliant, suitable for military and aerospace applications.