These washers surpass most other plastic washers when it comes to withstanding chemicals, oil, and grease. All are excellent electrical insulators.

PTFE washers withstand high temperatures and have a slippery surface that resists wear in high-friction applications.

PVC washers resist acids and alkalies.

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These washers are excellent electrical insulators.

Phenolic washers have low moisture absorption, so they won’t expand or become brittle over time. Color ranges from red-brown to yellow-brown.

Hard fiber washers are resistant to organic solvents and petroleum-based oils. They meet the dimensional standards of DIN 125, but not all meet the thickness requirement.

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Low moisture absorption and good heat resistance make these washers suitable for wet and harsh environments. All are good electrical insulators.

Delrin® acetal plastic washers combine a slippery, wear-resistant surface with good strength and rigidity.

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Clipped to fit where standard washers can't, these won't rotate when you position the flat edge against a flat surface.

18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.

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These washers have smaller outside diameters than standard spring lock washers to fit neatly under socket head cap screws. Also known as conical washers, these have a slightly cupped shape that gives them spring-like flexibility to grip tighter than split and tooth lock washers. They minimize loosening from wear, temperature changes, and vibration. Serrations on the top and bottom provide extra gripping power. Load-rated Belleville disc springs are also available.

Zinc-plated steel washers are corrosion resistant in wet environments.

18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.

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Designed for use with plastic screws, these acetal washers are good electrical insulators. They are excellent for use under water and in rotating assemblies. Their slightly cupped shape gives them spring-like flexibility to grip joints tighter than split and tooth lock washers.

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As you tighten a bolt, these metric washers flatten to add tension to the threaded joint and prevent loosening from small amounts of vibration. They meet a DIN or ASME standard for split lock washer dimensions.

Standard split lock washers match with fasteners that have right-hand threads to prevent clockwise rotation. They have uneven split ends that bite into fasteners for a tight grip but won’t work with hardened surfaces. They hold better than curved or wave washers. These washers are not reusable after tightening.

Curved and wave split lock washers can be used with fasteners that have right- or left-hand threads to prevent clockwise and counterclockwise rotation. These washers are reusable—they retain their shape when untightened and will not damage fasteners. Stainless steel washers resist corrosion better than steel and are nearly as strong. 18-8 stainless steel washers withstand humid, damp, and washdown environments but will corrode when exposed to salt water and other chlorine solutions. 316 stainless steel washers resist corrosion from wet environments as well as salt water, chlorine solutions, and chemicals. Stronger and more durable than stainless steel, zinc-plated and yellow zinc-plated steel washers withstand wet environments. However, they will corrode in salt water and chlorine solutions. The zinc plating temporarily protects against rust, but once it wears off, the steel will rust.

Steel washers are stronger and resist wear better than zinc-plated steel and stainless steel washers. Use them in dry environments.

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Also known as high-collar lock washers, these metric washers have smaller outside diameters than standard split lock washers to fit neatly under socket head cap screws. As the screw is tightened, these washers flatten to add tension to the joint. They counteract fatigue around the joint from small amounts of vibration, making them a common choice to prevent fasteners from loosening. However, they resist the least amount of vibration compared to other locking washers.

These washers are compatible with fasteners that have right-hand threads to prevent clockwise rotation. The uneven split ends bite into fasteners for a tight grip, but they won’t work with hardened surfaces. These washers hold better than curved or wave washers. They are not reusable after tightening.

18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.

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Internal teeth dig into the screw head while the smooth outside edge won't snag objects. These washers provide greater vibration resistance than split lock washers. Use with fasteners that have small heads, such as fillister and cheese head screws.

Zinc-plated steel washers resist corrosion in wet environments.

18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.

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Teeth on the outside edge of these washers bite into the screw head and joint for a tight grip. Use with fasteners that have heads large enough to make contact with the teeth, such as pan, button, and binding head screws.

Zinc-plated steel washers are corrosion resistant in wet environments.

18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.

For technical drawings and 3-D models, click on a part number.