MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 52 insert arrangements available, they utilize M39029 rear release crimp contacts for secure connections. Operating in a wide temperature range from -65 °C to 200 °C, these connectors come in high strength aluminum shells with various plating options, including RoHS-certified finishes. Ideal for military and industrial applications, they ensure reliable performance with their durable construction and conductive properties.