MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range spanning from -65 °C to 200 °C, these connectors offer durability and reliability. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts. The connectors come in high-strength aluminum shells with a selection of plating options, including cadmium-free finishes. Offering RFI grounding plugs and multiple mounting options, such as front wall mount, rear wall mount, and jam nut receptacles, they ensure secure connections in military and industrial applications. With a contact plating of gold and a service rating of M, these connectors meet stringent performance standards.