MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various configurations such as front and rear wall mount receptacles, they offer RFI grounding plugs and utilize M39029 rear release crimp contacts. With 9 shell sizes and 52 insert arrangements, these connectors are highly versatile. Constructed with high-strength aluminum shells and offering multiple plating options including cadmium-free finishes, they ensure reliable performance. Meeting military specification MIL-DTL-38999 I, these circular connectors are ideal for applications requiring durability and environmental resistance.