Wood Screws

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Wood screws are used to join pieces of wood. 

Wood screws can also be used to attach hardware to wood, as long as there is a pilot hole drilled to accommodate the unthreaded portion of the screw. Wood screws have a tapered body along with coarse threads. The upper portion of their shank is unthreaded; the unthreaded portion improves the screw’s ability to pull mating pieces of wood together. Wood screws are specially tempered so that they will bend before breaking—this is important because wood shrinks and expands over time, due to seasonal variations in relative humidity.