MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a sealed insert. Designed for harsh environments, these connectors operate reliably in temperatures ranging from -65 °C to 200 °C. The versatile family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, catering to diverse installation needs. With 52 insert arrangements and M39029 rear release crimp contacts available in various sizes, these connectors ensure secure and efficient connections. Crafted with durable aluminum shells and offering multiple plating options, including RoHS-certified finishes, they guarantee long-lasting performance in demanding applications. Meeting MIL-DTL-38999 I specifications, these circular receptacles provide reliable connectivity for mission-critical systems, making them ideal for military and aerospace applications.