lock nut

or locknut


nounMachinery.
  1. a nut specially constructed to prevent its coming loose, usually having a means of providing extra friction between itself and the screw.

  2. Also called jam nut. a thin supplementary nut screwed down upon a regular nut to prevent its loosening.

Origin of lock nut

1
First recorded in 1860–65

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use lock nut in a sentence

British Dictionary definitions for locknut

locknut

/ (ˈlɒkˌnʌt) /


noun
  1. a supplementary nut screwed down upon a primary nut to prevent it from shaking loose

  2. 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 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012