MIL-DTL-38999/24 III (D38999) connectors are designed for harsh environments, featuring wall mount and jam nut receptacles along with self-locking RFI plugs. With 9 shell sizes and 54 insert arrangements available, they offer versatility for various applications. Utilizing M39029 contacts in sizes 22D, 20, 16, 12, 10 power, and 8 twinax, these connectors ensure reliable connectivity. Constructed from aluminum, stainless steel, or lightweight composite, and with a range of plating options including gold and nickel, they meet stringent military specifications. The C98 shell size, featuring 10 removable crimp contacts, is specifically designed for use in demanding environments, with a service rating of I and a service class of M. These connectors are not RoHS compliant, making them ideal for military and aerospace applications.