The 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 of -65°C to 200°C, they offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for different plating finishes. The connector family includes front and rear wall mount receptacles, as well as jam nut receptacles and RFI grounding plugs. Utilizing M39029 rear release crimp contacts, they ensure secure connections with sizes ranging from 22D to 8. Ideal for military and aerospace applications, these circular connectors are built to withstand rugged use, meeting stringent MIL-DTL-38999 I specifications.