The MIL-DTL-38999 Series I connectors offer reliable connectivity in harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range from -65 °C to 200 °C, these connectors are suitable for a wide range of applications. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. The high strength aluminum shells come in different plating options, including cadmium-free finishes, meeting RoHS compliance. Designed for military specifications, these circular receptacles are ideal for back panel and box mounting with bayonet coupling, ensuring efficient and durable performance in demanding conditions.