Bonded sealing washers are used in water-related applications.
Fender washers can be used in auto repair and plumbing projects.
Finishing washers accommodate the heads of countersunk screws.
Flat washers provide a smooth bearing surface to distribute loads.
Lock washers have a bent surface to prevent loosening.
Malleable washers prevent bolts from pulling out of wood.
Pronged and square washers can be used to reduce vibration.
Square washers are designed to limit stress on contacting parts.