Locknut meaning

    lŏk'nŭt'
    A usually thin nut screwed down on another nut to prevent it from loosening.
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    A self-locking nut.
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    A thin nut screwed typically onto or above an ordinary nut to prevent the latter from working loose.
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    Any of various nuts specially designed to resist loosening.
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    A second nut, screwed down onto another in order to prevent it slipping.
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