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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.
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Word History and Origins
Origin of lock nut1
First recorded in 1860–65
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Example Sentences
When this adjustment is secured the lock nut is screwed in place so the needle valve will keep the adjustment.
From Project Gutenberg
A lock nut (H), which has corresponding projections (IJ) is slipped over the post as shown at , and is given a quarter turn.
From Project Gutenberg
Then a coupling is cut while screwed on a pipe, so that a lock nut about 1⁄2 inch wide is made.
From Project Gutenberg
A lock nut, O, should be provided for this screw so that it will remain in adjustment.
From Project Gutenberg
The second nut is technically known as a “jam nut,” or “lock nut.”
From Project Gutenberg
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