Types of Screw and Bolt
Threaded fasteners either have a tapered shank or a non-tapered shank. Fasteners with tapered shanks are designed to either be driven into a substrate directly or into a pilot hole in a substrate. Mating threads are formed in the substrate as these fasteners are driven in. Fasteners with a non-tapered shank are designed to mate with a nut or to be driven into a tapped hole.
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—Albert Camus (1913–1960)
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—Henry David Thoreau (1817–1862)
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—Andrew Jackson (1767–1845)