The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65 °C to 200 °C, they ensure reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for plating, including cadmium-free finishes. Offering front wall mount, rear wall mount, and jam nut receptacles, they use M39029 rear release crimp contacts for secure connections. MIL-DTL-38999 I connectors are ideal for military and aerospace applications, providing environmental sealing and RFI grounding for optimal reliability.