MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With a wide operating temperature range of -65°C to 200°C, they offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with multiple plating options including gold, electroless nickel, and cadmium finishes. Ideal for military and aerospace applications, they ensure secure and durable electrical connections with their bayonet coupling and removable crimp contacts. RoHS compliant options are also available for environmentally conscious projects.