lock nut
Americannoun
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a nut specially constructed to prevent its coming loose, usually having a means of providing extra friction between itself and the screw.
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Also called jam nut. a thin supplementary nut screwed down upon a regular nut to prevent its loosening.
Etymology
Origin of lock nut
First recorded in 1860–65
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The lock nut survived the last check, so back it goes on the bearing again.
From New York Times • May 5, 2010
To lock the setting into place, retighten the 4mm Allen first, and then tighten the 12mm lock nut.
From Time Magazine Archive
Be sure to check the manufacturer's specified torque specs to torque down the axle nut and lock nut appropriately.
From Time Magazine Archive
With a 12mm wrench, break the 12mm lock nut loose by turning it counterclockwise.
From Time Magazine Archive
Screw-thread attachments should be used, and the crankshaft should project sufficiently to allow room for a flat lock nut.
From Things To Make by Williams, Archibald
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
