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 shell sizes and insert arrangements, these connectors offer front and rear wall mount options as well as jam nut receptacles, all with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, they ensure secure connections. Crafted from high-strength aluminum, they come in a range of plating options including cadmium-free finishes. Meeting MIL-DTL-38999 I standards, these circular receptacles are ideal for military and aerospace applications requiring durability and reliability in extreme conditions.