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 from -65°C to 200°C. Available in front wall mount, rear wall mount, and jam nut receptacles, this connector family offers versatility with 52 insert arrangements and M39029 rear release crimp contacts. Constructed with high strength aluminum shells and various plating options such as gold, electroless nickel, and cadmium finishes, these connectors ensure reliable performance. Ideal for military and industrial applications, they meet MIL-DTL-38999 I specifications for durability and conductivity.