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wing nut

or wing·nut

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noun
  1. a nut having two flat, widely projecting pieces such that it can be readily tightened with the thumb and forefinger.

Origin of wing nut

First recorded in 1895–1900
Also called butterfly nut, thumbnut.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for wing nut

Historical Examples

  • “Close those shutters and screw down the wing-nut hard,” he said, hanging the lamp close beside the door.

    Lorimer of the Northwest

    Harold Bindloss

  • The holding screws for the vane and tripod mounting are rather crudely hand cut with wing-nut ends.


British Dictionary definitions for wing nut

wing nut

noun
  1. a threaded nut tightened by hand by means of two flat lugs or wings projecting from the central bodyAlso called: butterfly nut
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012