The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts within an environmentally sealed insert. With an operating temperature range from -65 °C to 200 °C, these connectors offer durability in extreme conditions. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. The high strength aluminum shells come in plating options such as electroless nickel and cadmium finishes. Offering reliable performance with gold-plated contacts, these connectors are ideal for military and industrial applications requiring rugged connectivity.