The MIL-DTL-38999 Series I connectors boast up to 128 contacts within an environmentally sealed insert, designed for rugged applications with an operating temperature range of -65 °C to 200 °C. Featuring front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs, these connectors offer versatility in connectivity solutions. With 9 shell sizes and 52 insert arrangements available, they accommodate various configurations, utilizing M39029 rear release crimp contacts. Constructed with high strength aluminum shells and offered in different plating options, including RoHS certified finishes, these connectors ensure reliability in harsh environments. Suitable for military and industrial use, they provide durable and secure connections, meeting stringent performance standards.