One of the mysteries of the English language finally explained.
A straight rod or pin with an external spiral ridge and a blunt end onto which a nut may be threaded to bolt things together.
with object To fasten with a screw-bolt. Chiefly in pass.
Late 17th century; earliest use found in Wren Society. From screw + bolt<br>late 18th century; earliest use found in William Herschel (1738–1822), musician and astronomer. From screw-bolt.
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