MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Crafted from high-strength aluminum, these connectors come with a choice of plating options, including cadmium-free finishes. They use M39029 rear release crimp contacts for reliable connections. Meeting military specification MIL-DTL-38999 I, these circular receptacles, with gold contact plating, ensure durability and conductivity in demanding applications. Suitable for wall mounting, they are ideal for use in environments requiring environment-resistant and conductive features.