MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mount types including front wall, rear wall, and jam nut receptacles, they offer versatility in connectivity solutions. With 52 insert arrangements and M39029 rear release crimp contacts, these connectors ensure reliable performance. Constructed with high-strength aluminum shells and offered in multiple plating options, such as gold and electroless nickel, they meet stringent military specifications for durability. RoHS compliant finishes are also available, making them suitable for a range of applications requiring high reliability and performance in challenging conditions.