MIL-DTL-38999 Series I connectors offer rugged performance with up to 128 contacts housed in an insert, suitable for harsh environments. Designed for durability, they feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With a wide operating temperature range of -65 °C to 200 °C, these connectors are ideal for demanding applications. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells and offered in different plating options like gold, electroless nickel, and cadmium-free finishes, these connectors ensure reliable connectivity. MIL-DTL-38999 I connectors are essential for applications requiring secure and efficient circular connectivity in challenging environments.