Except for differences in size and head style, one screw is pretty much like another, right? That’s what I thought until I took a closer look.
At the recent International Builders’ Show I came across the GRK FASTENER exhibit. The company makes screws – lots of them. What’s really interesting though is how they design them. Now, admittedly, I never gave much thought to designing a screw, but, clearly GRK does. Their fasteners hold several patents that make them truly unique – from tip to head.
Threads That Cut Rather Than Push
The tip is self-drilling for fast starts. Just above that the is a special thread design that acts like a mini saw blade, actually cutting through any fibrous material and dramatically reducing the amount of torque required. The screw virtually pulls itself into the material with practically no pressure on the drill. This is true even when drilling directing into the center of a knot. Also, these screws significantly reduce splitting because the thread is designed to cut through fibers rather than pressing them aside.
More Drawing Power
The lower portion of the screw shank features what GRK calls CEE threads that enlarge the screw hole for the non-threaded portion of the fastener — reducing friction on the screw shank and further lowering the torque required for driving. The CEE thread also increases the screw’s ability to draw itself into wood, particle board, composite decking and other materials.
A Screw Head with Teeth
Even the screw head is uniquely designed. Cutting teeth on the underside cut a perfectly clean hole even in the most brittle materials and self-countersinking cutting pockets transport drill dust away from the edge of the screw hole.
The best way to understand what all these features really mean is to grab a drill and drive one in. You’ll see what I mean when I say the fastener practically drives itself.