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Dictionary

cas'tellated nut'

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. See illus. under nut. Also called castle nut.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

castellated beam

castellatus

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