The MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various configurations including front and rear wall mount, jam nut receptacles, and RFI grounding plugs, these connectors offer versatility in connectivity solutions. With 9 shell sizes and 52 insert arrangements, they accommodate M39029 rear release crimp contacts in multiple sizes. Constructed with high-strength aluminum shells and offering plating options such as electroless nickel and cadmium finishes, these connectors ensure reliable performance in demanding applications. RoHS compliant versions are also available, making them suitable for a wide range of industries requiring rugged and environmentally sealed connectors.