Use to install 19-in. wide equipment in 25.5-in. wide enclosures and 23-in. wide equipment in 36-in. wide enclosures. Order two sets for 52- and 72-in. wide two-door enclosures. Galvanized 14 gauge steel with square holes spaced to meet EIA 310-D stand ards. Mount to factory-drilled holes in top and bottom of front flange. Purchase clip nuts, catalog number AN1032, separately for component mounting.