castellated nut

noun

a tall lock nut, having on its outer face radial slits allowing for insertion of a cotter pin or wire in both the nut and a hole in its bolt, so as to prevent the nut from coming loose.

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Nearby words

castellanos, castellanus, castellany, castellated, castellated beam, castellated nut, castellatus, castellum, castellón de la plana, castelnuovo-tedesco, castelo branco

Origin of castellated nut

First recorded in 1900–05

Also called castle nut.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019