MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an insert, offering environmental sealing and a wide operating temperature range of -65°C to 200°C. Available in various configurations including front and rear wall mount receptacles, as well as jam nut receptacles, this harsh environment connector family meets stringent military specifications. With 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in multiple sizes. Constructed with high strength aluminum shells and offering plating options such as cadmium and electroless nickel, these connectors ensure reliable performance in demanding applications. RoHS certified finishes are also available, making them suitable for a range of industries.