MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with operating temperatures ranging from -65 °C to 200 °C. Available in front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding options. With 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in various sizes, including coax and twinax. Constructed with high strength aluminum shells, they come in plating options like cadmium and nickel. RoHS compliant finishes are also available, ensuring environmental safety. Perfect for military specifications, these circular connectors guarantee reliability and durability in demanding applications.