MIL-DTL-38999 Series I connectors offer high-performance connectivity in harsh environments, featuring up to 128 contacts within an environmentally sealed insert. With an operating temperature range spanning from -65 °C to 200 °C, these connectors are designed for durability. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts in multiple sizes for versatile connectivity options. Constructed with high-strength aluminum shells, they come with a choice of plating finishes, including RoHS-certified options. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, ensuring flexibility in installation. With a bayonet coupling design and gold contact plating, they offer reliable performance with 500 mating cycles. Suitable for military and industrial applications, these connectors provide secure and conductive connections in demanding settings.