Metal Lock Nuts
Lock nuts are threaded nuts used to resist loosening caused by vibration, movement, or torque reversal. American Bolt Corporation supplies lock nuts for manufacturing, mechanical, and industrial applications where standard hex nuts are not sufficient to maintain joint integrity.
Lock nuts are commonly used with bolts, studs, and threaded rod in equipment, assemblies, and systems subject to motion or dynamic loading.
What Is a Lock Nut?
A lock nut is a nut with a built-in feature that creates prevailing torque, helping the nut stay in position once installed. Unlike standard hex nuts, lock nuts reduce the likelihood of backing off without relying on adhesives or separate locking washers.
They are commonly specified where vibration resistance and repeatable installation are required.
Lock Nut Types & Options
American Bolt Corp supplies the following lock nut styles commonly used in mechanical and industrial applications:
Unitorque Lock Nuts
Unitorque lock nuts are all-metal prevailing-torque nuts that use distorted threads to resist loosening. They are suitable for applications where higher temperatures or chemical exposure make nylon inserts unsuitable.
Flange Unitorque Lock Nuts
Flange unitorque lock nuts combine an integral flange with an all-metal locking feature. The flange helps distribute load while the prevailing-torque design resists vibration, eliminating the need for a separate washer.
Flex Lock Nuts
Flex lock nuts use a flexible, all-metal locking design that provides resistance to loosening while allowing repeated installation and removal. Commonly used in mechanical assemblies and equipment.
For other locking nut styles, see:
Contact American Bolt Corp
For availability or help selecting the correct lock nut type for your application, contact American Bolt Corp. Our team can assist with material, size, and locking feature selection.