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lock nut

 - 2 dictionary results

lock nut

–noun Machinery.
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.
Also, locknut.


Origin:
1860–65
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To lock nut
lock·nut also lock nut   (lŏk'nŭt')   
n.  
  1. A usually thin nut screwed down on another nut to prevent it from loosening.

  2. A self-locking nut.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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