lock·nut

also lock nut (lŏk′nŭt′)

1. A usually thin nut screwed down on another nut to prevent it from loosening.

2. A self-locking nut.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

locknut

(ˈlɒkˌnʌt)

1. (Mechanical Engineering) a supplementary nut screwed down upon a primary nut to prevent it from shaking loose

2. (Mechanical Engineering) a threaded nut having a feature, such as a nylon insert, to prevent it from shaking loose

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun

locknut - supplementary nut that is screwed down on a primary nut to prevent it from loosening

safety nut

nut - a small (usually square or hexagonal) metal block with internal screw thread to be fitted onto a bolt

Translations

contre-écrou

locknut

[ˈlɒknʌt] N → contratuerca f

Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

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References in periodicals archive

Crawl under the sink and check for corrosion on the large drain locknut. If it's corroded, spray all around the nut with rust penetrating oil and allow it to soak for at least 15 minutes.

Home care + repair

Bettencourt told a military investigator that Hickey was a rogue employee who "on his own volition, purchased and obtained substandard locknuts for a Department of Defense contract for Bell Kiowa helicopters," the FBI agent wrote.

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Standard Locknut is a bearing accessory and contract-machining manufacturer, catering to the bearing and power transmission industries.

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Place locknut, then coupling nut on shank and fasten securely (Fig.

Repairing a toilet

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That could loosen the locknut on the backside of the connector and allow the connector to turn.

Helmet pm is not negotiable

The bolt in the picture was a carriage bolt and a locknut. The article described a hexagonal nut and bolt.

Symbols and hexes

Sometimes you can stop a leak by tightening the locknut. But in many cases, the only cure is a new dose of putty.

Stop leaks under the sink: it's time to get rid of that drip-catching bucket under your kitchen sink. Whether your pipes need total replacement or just tightening, here's how to put an end to the leaks

The locknut was protruding along the track and prevented the full travel of the hose guide, causing the hose guide to shear and to jam the hose.

Basket case

Manufacturing locknuts is a repetitive motion process that can be mundane, and for some time management at Security Locknut had been concerned about the impact of job satisfaction on productivity.

Robot cell in smaller shop delivers large benefits. (Robotics)