MIL-DTL-38999 Series I connectors offer reliable connectivity in harsh environments with up to 128 contacts housed in an environmentally sealed insert. Operating between -65 °C and 200 °C, these connectors come in various configurations including front and rear wall mount, jam nut receptacles, and RFI grounding plugs. With 9 shell sizes and 52 insert arrangements, they accommodate M39029 rear release crimp contacts in different sizes, ensuring versatility. Constructed with high-strength aluminum shells and available in multiple plating options such as cadmium and nickel, they provide durability and corrosion resistance. Featuring bayonet coupling and gold-plated removable crimp contacts, these connectors guarantee secure and efficient electrical connections in applications requiring stringent performance standards.