MIL-DTL-38999 Series II connectors offer robust performance in harsh environments with up to 128 contacts and environmental sealing. Operating between -65 °C and 200 °C, these connectors come in various styles such as front wall mount, rear wall mount, and jam nut receptacles. Featuring thin-walled construction and restricted length, they provide durability and reliability. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. With options for gold contact plating and various shell coatings, including electroless nickel, these connectors ensure optimal conductivity and corrosion resistance. Designed for military specifications, they meet stringent performance standards for applications requiring a rugged and dependable electrical interface.