wing nut

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or wing nut  (wĭng′nŭt)
1. A nut with winglike projections for thumb and forefinger leverage in turning. Also called thumbnut.
2. Slang
a. A person with extreme or fanatical political views.
b. A crazy or eccentric person.

[Senses 2a and 2b influenced by wing, faction.]
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.

wing nut

(Mechanical Engineering) a threaded nut tightened by hand by means of two flat lugs or wings projecting from the central body. Also called: butterfly nut
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

wing′ nut`

a nut having two flat, widely projecting pieces such that it can be readily tightened with the thumb and forefinger.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.wing nut - any tree of the genus Pterocarya; fruit is a small winged nutlet; Caucasus to southeastern Asia
genus Pterocarya, Pterocarya - Asiatic nut trees: wing nuts
Caucasian walnut, Pterocarya fraxinifolia - medium-sized Caucasian much-branched tree distinguished from other walnut trees by its winged fruit
nut tree - tree bearing edible nuts
2.wing nut - a threaded nut with winglike projections for thumb and forefinger leverage in turningwing nut - a threaded nut with winglike projections for thumb and forefinger leverage in turning
nut - a small (usually square or hexagonal) metal block with internal screw thread to be fitted onto a bolt
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

wing nut

Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
References in periodicals archive ?
"I put a washer, lock washer and wing nut on the rod to match the length of a frame.
Stay alert by fidgeting with the wing nut, the nut and bolt and two other fidgets.
A wing nut is provided to adjust angle without need of any tool.
The BULTE washer faced wing nut is now included in the enlarged range of Bulte plastics' nuts.
The company's first enhancement is a cable tie retaining ring on the wing nut that helps to facilitate a secure and safe tamper evident feature.
Also: the securing nut should not be a wing nut or nylock.
That eventually causes the wing nut bolt for the throttle to break and then the throttle won't stay in one position.
Types of nut - walnut, wing nut, donut, pine nut, coconut, hazelnut, peanut, Brazil nut, and almond
Types of nut - walnut, wing nut, doughnut, pine nut, coconut, hazelnut, peanut, brazil nut and almond.
As for his assessment of the "global warming scare," we all need to keep in mind that this is the wing nut who, in a (May 28, 2006) interview with The Washington Post, blurted out that "Gore believed in global warming almost as much as Hitler believed there was something wrong with the Jews." This is the level of intelligence you seek to foist on your readers?
The new safety clamps--easily identified by their red wing nuts--can only be released when the wing nut has been significantly loosened to enable the smaller diameter of the gate bolt to swing and pass through the sectioned gate.