The MIL-DTL-38999 Series I connectors are engineered for harsh environments, featuring up to 128 contacts within a sealed insert. Operating reliably in temperatures ranging from -65°C to 200°C, these connectors offer versatility with front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with high strength aluminum shells, they come with various plating options such as electroless nickel and cadmium finishes. RoHS certified options are also available, ensuring compliance with environmental regulations. Suitable for military and industrial applications, these connectors provide reliable performance in demanding conditions.