Patent ID: 7357606

Claim:
A tool for simultaneously forming a bore in a work piece and forming a series of threads in said bore, wherein said tool has a predetermined axial length, a proximal end, and a distal end, said tool comprising: a shank located at said proximal end; a pilot drill portion located at said distal end; and a mill portion intermediately disposed between said shank and said pilot drill portion, wherein said mill portion is comprised of at least two drill-tap sections of predetermined axial lengths and at least one transition section of predetermined axial length, wherein each of said at least one transition section is sandwiched between a distinct set of two of said at least two drill-tap sections, wherein each of said at least two drill-tap sections has a predetermined first distal diameter and a predetermined first proximal diameter, wherein each of said at least one transition section has a predetermined second distal diameter and a predetermined second proximal diameter, wherein said second distal diameter is less than said second proximal diameter, wherein each of said at least one transition section has a second distal diameter equivalent to a distinct one of said at least two drill-tap sections' first proximal diameter, wherein each of said at least one transition section has a second proximal diameter equivalent to a distinct one of said at least two drill-tap sections' first distal diameter, wherein each of said at least two drill-tap sections is formed of one or more drill-tap cutting teeth spirally increasing along said at least two drill-tap sections, wherein said tool is self-advanced in said work piece along said formed threads, and wherein said tool simultaneously forms said bore and said series of threads along a substantially similar longitudinal axis.