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 History of this Word

"machine" is from "engine", spoken in France
which is from "machina", spoken by ancient people in central Italy around 700 B.C.
which is from "machos" (a thing built in a skillful manner), spoken by people of Greece starting about 1000 B.C.

"screw" is from "escroue" (hole that a screw turns in), spoken in France during 1000-1400 A.D.
which was from "scrofa" (sow, threads of a screw look like the curl of a sow's tail), spoken by ancient people in central Italy around 700 B.C.

"bolt" is from "bolt" (arrow), spoken by people in England during 450-1100 A.D.


Often called a screw for a recessed (internal) drive and bolt for an external drive.

Words related to this meaning

grammar is noun

drive, head, thread are parts of "machine screw"

"machine screw" is a type of screw


machine screw illustration machine screw illustration Rod with spiral threads the entire length and with one flat end and a head on other end. Holds object to another object that has a pre-threaded hole, frequently a nut. Usually manufactured from metal. Can be rotated into or out of the object using a screwdriver or wrench.

Examples of how the word is used

machine screw illustration Start all machine screws by first turning the screw backwards while gently pressing with the screwdriver, feel for a "click" as the threads engage.
machine screw illustration Turn each machine screw, first by hand, then with a screwdriver.