The MIL-DTL-38999 Series I connectors offer reliable connectivity in harsh environments, featuring up to 128 contacts within an environmentally sealed insert. With an operating temperature range of -65°C to 200°C, these connectors are suitable for a variety of applications. Available in multiple shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. The high-strength aluminum shells come in various plating options, including cadmium-free finishes for RoHS compliance. Designed for military specifications, these circular receptacles with bayonet coupling and wall mounting flanges ensure durability and performance in demanding settings.