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 of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, these connectors offer versatility with M39029 rear release crimp contacts. The high-strength aluminum shells come in a range of plating options, including RoHS-certified cadmium-free finishes. With options for front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide reliable connectivity in demanding applications.