a modular tile for an access floor panel system wherein the tile includes a mechanism for positively locating the tile on an access floor panel so as to be replaceable and removable without the use of indexing tools or fixtures through the tile &# 39 ; s bottom surface or the panel &# 39 ; s top surface and having a configuration which orients the tile to the access floor panel , the size of the tile being consistent and modular with each and every access floor panel in the access floor panel system .