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. Constructed with high-strength aluminum shells and offering multiple plating options, including RoHS-certified finishes, they ensure reliable performance. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, suitable for military and industrial applications requiring durability and resistance to environmental factors.