Fender Washers are flat washers with a patricularly large diameter in proportion to its central hole. They are commonly used to spread the load on thin sheet metal. They can also be used to make a connection to a hole that has been enlarged by rust to wear.

Beveled Washers are washers with a bevel on one side, and used mostly in structural steel work to provide a flat surface for the nut wherever a threaded rod or bolt passes through a beam at an angle. Zero Products, Inc.

External Tooth Lock Washers are washers that have serrations that extend radially outward to bite into the bearing surface. This type of washer is especially effective as a lockwasher when used with a soft substrate. Zero Products, Inc.

Extra Duty Lock washers are washers that are not completely smooth or flat, designed to prevent a nut from loosening, placed under the nut on a screw or bolt.

Regular Lock washers are washers that are not completely smooth or flat, designed to prevent a nut from loosening, placed under the nut on a screw or bolt. Used for light duty applications. Zero Products, Inc.