MIL-DTL-38999 Series I connectors are designed for harsh environments, offering up to 128 contacts in an insert with front wall mount, rear wall mount, and jam nut receptacles. Operating between -65 °C and 200 °C, these connectors feature RFI grounding plugs and utilize M39029 rear release crimp contacts in various sizes. With a range of plating options, including cadmium-free finishes, they come in high-strength aluminum shells. Ideal for military and aerospace applications, these connectors ensure reliable performance with a mating life of 500 cycles and environmental resistance.