U nuts

Known as captive nuts, spire nuts, spring nuts or clip nuts. Also chimney nuts, J nuts and lug nuts are variants of this style. Generally produced in hardened and tempered carbon steel in blue/black or zinc plated finish, to suit many gauges of sheet and sizes of screw, e.g. No. 4 to 12 and metric threads.

For more information on U nuts talk to Challenge (Europe) Ltd