MIL-DTL-38999 Series I connectors offer rugged performance with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs. With operating temperatures ranging from -65 °C to 200 °C, they provide reliable connectivity in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes. The high-strength aluminum shells come in a range of plating options, including cadmium-free finishes. Meeting military specification MIL-DTL-38999 I, these connectors are ideal for applications requiring durability and performance.