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 front wall mount, rear wall mount, and jam nut receptacles, they offer versatility in connectivity. With 52 insert arrangements and M39029 rear release crimp contacts, these connectors ensure reliable performance. Constructed with high-strength aluminum shells and various plating options, including cadmium-free finishes, they meet strict military specifications for durability. Perfect for applications requiring rugged connectivity in challenging conditions.