MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. This connector family includes front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs. With 9 shell sizes and 52 insert arrangements available, they utilize M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, they offer plating options like cadmium finishes and black anodized aluminum. The connectors are RoHS compliant and suitable for military and industrial applications requiring reliable performance in demanding conditions.