The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. These connectors, with an operating temperature range from -65 °C to 200 °C, offer versatility with front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs. Available in 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 plating options such as cadmium and nickel, ensuring durability. RoHS compliant finishes are also available. Perfect for military and industrial applications, these connectors guarantee reliable performance in demanding conditions.