The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, they offer durability in extreme conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for plating finishes like cadmium and nickel. Ideal for military and aerospace applications, they ensure reliable connectivity with their bayonet coupling and crimp type contact design. RoHS compliant options are also available for environmentally conscious users.