MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Offering front wall mount, rear wall mount, and jam nut receptacles, these connectors are crucial for military and aerospace applications. They come in 9 shell sizes and 52 insert arrangements, using M39029 rear release crimp contacts. Constructed with high strength aluminum shells, they are available in various plating options including cadmium-free finishes. These connectors are RoHS compliant and provide reliable connectivity in demanding conditions.