The MIL-DTL-38999 Series I connectors offer reliable connectivity in harsh environments with up to 128 contacts, sealed for environmental protection. Operating between -65 °C and 200 °C, they feature front wall mount, rear wall mount, and jam nut receptacles, along with 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 like electroless nickel and cadmium finishes. RoHS certified options are also available, ensuring compliance with environmental regulations. With gold contact plating and a durable design, these connectors are ideal for military and industrial applications requiring secure and efficient electrical connections.