MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering environmental sealing and an operating temperature range of -65 °C to 200 °C. This harsh environment connector family includes front and rear wall mount, as well as jam nut receptacles with RFI grounding plugs. With 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells, they come in different plating options like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS-certified cadmium-free finishes available. Ideal for military and industrial applications, these connectors ensure reliable performance in challenging conditions.