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 from -65 °C to 200 °C. Available in various configurations including front and rear wall mount, as well as jam nut receptacles, these connectors offer RFI grounding plugs and utilize M39029 rear release crimp contacts. With options for different plating finishes such as gold, electroless nickel, and cadmium-free coatings, the high-strength aluminum shells ensure durability. Meeting military specification MIL-DTL-38999 I, these circular receptacles are ideal for applications requiring reliable connectivity in demanding conditions.