Jām'-nūt, n.
n. A nut placed in contact with the main nut on the same bolt, to keep the main nut from turning; — called also check-nut and cock-nut. [See Illust. of Bolt.]
n. A nut placed in contact with the main nut on the same bolt, to keep the main nut from turning; — called also check-nut and cock-nut. [See Illust. of Bolt.]