MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering robust environmental sealing and a wide operating temperature range from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for plating, including RoHS certified finishes. The family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, all designed for harsh environments. Utilizing M39029 rear release crimp contacts, they ensure reliable connectivity, suitable for military and industrial applications requiring durability and performance in challenging conditions.