The CommScope Mounting Kit, FDF Series, 5/8 in (vendor part FDF-ACC146, Millennium part 519700), secures an FDF-series fiber distribution frame to a rack or wall using 5/8-inch hardware, keeping the frame stable under the weight and pull of terminated fiber cables. Inside plant techs use it during initial FDF installation in a central office or data center rack. It's built to CommScope's FDF spec for a direct, drop-in fit without modification. Order it alongside isolation pads and cable clamp kits for the same FDF series frame.