Patent ID: 7866116

Claim:
A method for connecting at least a first layer of nailable material to a second layer of nailable material with a connecting device, said connecting device including an axial core and a plurality of helical projections that extend radially from the core, wherein the core has a cross section comprising two-fifths or less of the circumscribed cross sectional area of the device, the accuracy of the pitch of the helical projections varies by no more than 0.5% from any given pitch along the axis of the device, and wherein the device includes a pointed leading end and a rear end comprising a retaining head or clip; said method comprising inserting the connecting device into the first and second layers of nailable material by percussively driving the connector device without first having created a pilot hole, said percussive driving causing the helical projections to cut substantially accurate helical pathways through the first and second layers of nailable material without creating non-conformity voids therein such that the connecting device interlocks with material along substantially the full length of each portion of the helical projections located within each nailable layer, and clamping the first layer of nailable material to the second layer of nailable material by engaging an outer surface of the first layer of nailable material with the retaining head or clip.