MIL-DTL-38999 Series I connectors feature up to 128 contacts, sealed for environmental protection with an impressive operating temperature range of -65 °C to 200 °C. These connectors come in various mounting options including front and rear wall mount, as well as jam nut receptacles with RFI grounding plugs. With 9 shell sizes and 52 insert arrangements available, they utilize M39029 rear release crimp contacts in multiple sizes. Constructed with high strength aluminum shells, they offer different plating options such as cadmium finishes and electroless nickel. Designed for harsh environments, these connectors meet stringent military specifications for reliability and performance.