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 from -65 °C to 200 °C. Available in various configurations including front and rear wall mount receptacles, as well as jam nut receptacles and RFI grounding plugs. These connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts in different sizes. Constructed with high strength aluminum shells and offered with plating options such as cadmium and nickel finishes. Ideal for military and industrial applications, these connectors ensure reliable performance with RoHS compliant options available.