Load Distribution
The primary purpose of most washers is to evenly distribute the load of the threaded fastener with which they are used. Threaded fasteners stress the material in which they are driven. Driving a screw into wood, for example, may cause the wood to crack around the surface. Washers reduce the risk of such damage by evenly distributing the fastener's load across the surface of the material. Not all materials require the use of washers. But for wood and other relatively soft materials, washers are useful to protect against stress-related damage when the threaded fastener is driven into the material.
Spacing
Washers can also be used as spacers. Why would you even need a spacer when driving a threaded fastener into an object? If the threaded fastener is longer than the depth of the object, you won’t be able to drive it into the object — not without having some of the fasteners stick out the back of the object, at least. Driving a 4-inch screw into an object that's 3 inches deep will result in 1 inch of the screw's tip protruding out of the back of the object. A simple solution to this problem is to use washers. Placing washers through the threaded fastener before driving it into the object creates padding so that the fastener doesn't go too deep.
Vibration Absorption
Certain types of washers are designed to absorb vibrations. Known as vibration damping or vibration isolating washers, they usually aren't made of metal. Instead, they are made of a softer material like plastic, rubber, or urethane. Softer materials such as these are more effective at absorbing vibrations than hard materials, including metal. If a threaded fastener is being used to connect two objects, and one of those objects producing vibrates aggressively, using vibration damping washers can protect the other object from damage.
Liquid Protection
Other types of washers prevent the ingress of water and liquids. They are often used in water pipes and connections to create a waterproof seal. Like vibration damping washers, liquid-sealing washers are made of a soft material that's able to press completely against the surface of the object.
- 1008722 WASHERS - FENDER 1/4 X 1
- 1008723 WASHERS - FENDER 1/4 X 1-1/2 100
- 1008724 WASHERS - FENDER 1/4 X 1-1/4
- 1008725 WASHERS - FENDER 1/4 X 2
- 1008726 WASHERS - FENDER 3/16 X 1
- 1008727 WASHERS - FENDER 3/16 X 1-1/4
- 1013555 WASHERS - FENDER 3/8 X 1-1/2
- 1008732 WASHERS - FENDER 5/16 X 1-1/2
- 1008734 WASHERS - FINISH NP #10 PK 100
- 1008741 WASHERS - FINISH NP #6 PK 100
- 1008743 WASHERS - FLAT SAE #10
- 1008744 WASHERS - FLAT SAE #6
- 1008745 WASHERS - FLAT SAE #8
- 1008747 WASHERS - FLAT SAE 1/4
- 1008753 WASHERS - FLAT STEEL 1/2
- 1008755 WASHERS - FLAT STEEL 1/4
- 1011574 WASHERS - FLAT STEEL 3/16
- 1008759 WASHERS - FLAT STEEL 3/4
- 1008761 WASHERS - FLAT STEEL 3/8
- 1008762 WASHERS - FLAT STEEL 5/16
- 1008764 WASHERS - FLAT STEEL 5/8
- 1008774 WASHERS - SPLIT LOCK #10
- 1008778 WASHERS - SPLIT LOCK #8
- 1008780 WASHERS - SPLIT LOCK 1/2 PK/100
- 1008782 WASHERS - SPLIT LOCK 1/4
- 1008799 WASHERS - SPLIT LOCK 3/8 PK/100
- 1008801 WASHERS - SPLIT LOCK 5/16 PK/100