MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer flexibility for different applications. These connectors come in high strength aluminum shells with options for plating, including RoHS certified finishes. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, ensuring secure connections. Utilizing M39029 rear release crimp contacts, they provide reliable performance with gold plating for optimal conductivity. Meeting military specification MIL-DTL-38999 I, these circular connectors are ideal for demanding industrial and aerospace environments.