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 History of this Word

"thread" is from "thraed" (thin long cord), spoken by people in England during 450-1100 A.D.

"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.

Words related to this meaning

grammar is noun

"thread" is a part of carriage bolt, dowel screw, drywall screw, lag screw, machine screw, nut, screw, set screw, sheet metal screw, tee nut, wing nut, wood screw

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Meaning 1

Definition

thread illustration thread illustration A spiral ridge on a rod (screw or bolt). A spiral groove in a hole (nut). Screw or bolt can be rotated into or out of an object. Formed into the screw or bolt during manufacture. Can be various sizes and shapes. Can be external (screw) or internal (nut). Can be left hand or right hand.

Examples of how the word is used

thread illustration Start all screws by first turning the screw backwards while gently pressing with the screwdriver, feel for a "click" as the threads engage.
thread illustration The most common screw thread form is the one with a symmetrical V-Profile.