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.
Late 17th century; earliest use found in Wren Society. From screw + bolt.
To fasten with a screw-bolt. Chiefly in passive.
Late 18th century; earliest use found in William Herschel (1738–1822), musician and astronomer. From screw-bolt.