MIL-DTL-38999 Series I connectors offer high-performance connectivity in harsh environments, featuring up to 128 contacts within an insert. With front wall mount, rear wall mount, and jam nut receptacles, these connectors ensure secure installations. Meeting military specification standards, they are environmentally sealed and can operate in temperatures ranging from -65°C to 200°C. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating various contact types including M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they are available in different plating options such as cadmium and electroless nickel, with RoHS compliant finishes also offered. These Circular Connectors are ideal for demanding applications that require reliable and durable electrical connections.