a nut specially constructed to prevent its coming loose, usually having a means of providing extra friction between itself and the screw.
Also called jam nut. a thin supplementary nut screwed down upon a regular nut to prevent its loosening.
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Origin of lock nut
First recorded in 1860–65
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use lock nut in a sentence
When the bolt has been screwed down sufficiently tight a locknut may be put on, or the first nut soldered to the end of the bolt.
A locknut is used beneath the notched nut to hold the adjustment.
A locknut is used to hold the screw in any desired position.
British Dictionary definitions for lock nut
a supplementary nut screwed down upon a primary nut to prevent it from shaking loose
a threaded nut having a feature, such as a nylon insert, to prevent it from shaking loose
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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