A floor installation system comprises a fastening system for interlocking a plurality of hardwood floor members. The fastening system utilizes a plurality of main fasteners that pass laterally into each hardwood floor member at set intervals. Each of the main fasteners includes an elongated shank having opposite distal ends each provided with at least one radially projecting substantially annular tooth. The opposite distal ends of each of the plurality of the main fasteners are adapted to be matingly received in opposite bore holes formed in adjacent flooring members to form an interlocking fastener.