1
: a screw screwed through one part tightly upon or into another part to prevent relative movement
2
: a screw for regulating a valve opening or a spring tension

Examples of setscrew in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Most motors and machines, including anything with belts and pulleys, have tiny setscrews that only accept Allen wrenches. — Joseph Truini, Popular Mechanics, 25 Apr. 2020

Word History

First Known Use

1849, in the meaning defined at sense 1

Time Traveler
The first known use of setscrew was in 1849

Browse Nearby Words

Cite this Entry

“Setscrew.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/setscrew. Accessed 26 Sep. 2026.

More from Merriam-Webster on setscrew

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!