Try Our Apps


Pore Over vs. Pour Over

lock nut

or locknut

noun, Machinery
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.
Origin of lock nut
1860-65 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the Web for lock nut
Historical Examples
  • A lock nut (H), which has corresponding projections (IJ) is slipped over the post as shown at , and is given a quarter turn.

  • A lock nut, O, should be provided for this screw so that it will remain in adjustment.

  • Then a coupling is cut while screwed on a pipe, so that a lock nut about 1⁄2 inch wide is made.

    Elements of Plumbing Samuel Dibble
  • When this adjustment is secured the lock nut is screwed in place so the needle valve will keep the adjustment.

    Aviation Engines Victor Wilfred Pag
  • A lock nut should be used in conjunction with this set screw.

  • The second nut is technically known as a “jam nut,” or “lock nut.”

    The Scientific American Boy A. Russell (Alexander Russell) Bond

Word of the Day

Difficulty index for lock nut

Few English speakers likely know this word

Word Value for lock

Scrabble Words With Friends

Nearby words for lock nut