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 History of this Word

"shoulder" is from "sculdor", 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

"shoulder" is a part of screw

Definition

shoulder illustration A part of a screw or bolt below the head that has no thread and provides a smooth surface that can tightly mesh with an object. Designed into the screw or bolt. Can be various sizes.

Examples of how the word is used

shoulder illustration A shoulder bolt is a special kind of bolt. It has an unthreaded length which is precisely machined, both as to length and diameter.
shoulder illustration A coil spring held with a shoulder screw provides the preload for each coupling.