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 mounting styles including front wall, rear wall, and jam nut receptacles, they offer RFI grounding plugs and utilize M39029 rear release crimp contacts. With 52 insert arrangements in 9 shell sizes, these connectors are versatile and durable, housed in high-strength aluminum shells with options for plating finishes such as cadmium and electroless nickel. Meeting military specification MIL-DTL-38999 I, they ensure reliable connectivity in demanding applications.