Also known as Type B washers, these distribute your fastener's load over a larger surface area than other washers to limit damage to soft materials.

18-8 stainless steel washers have excellent corrosion resistance in most environments and may be mildly magnetic.

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

316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.

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When you’ve applied the correct tension, these washers release an orange dye as a visual indicator.

Class 8.8 washers are designed to support structural screws, studs, and nuts. Use them with DIN 6914 structural hex head bolts and DIN 6915 structural hex nuts. Galvanized Class 8.8 washers are ten times as corrosion resistant as zinc-plated steel washers. Since they are strong and rust resistant, these washers are often used for construction and on building exteriors.

Class 10.9 washers are stronger than Class 8.8 washers. Zinc-plated Class 10.9 washers won’t rust in wet environments.

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These washers are excellent electrical insulators.

Hard fiber washers are resistant to organic solvents and petroleum-based oils.

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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. Wave washers touch fasteners at more points, so they grip tighter than curved washers. Their shape also compensates for uneven surfaces and tolerance variations.

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. Blue-dyed steel washers are easy to spot. Black-oxide steel washers have a black residue that forms from being heat treated; the color will wear away over time.

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Also known as high-collar lock washers, these have smaller outside diameters than standard split lock washers to fit neatly under socket head cap screws. As a screw is tightened, they flatten to add tension to the joint and prevent loosening from small amounts of vibration.

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

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

316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.

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

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.

The teeth on these washers bite further into the screw head and joint than standard external-tooth washers to provide a stronger hold. Use with fasteners that have heads large enough to make contact with the teeth, such as pan, button, and binding head screws.

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.

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

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.

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Bend the tab of these metric lock washers against the flats of a hex nut or bolt head to prevent the fastener and washer from turning and loosening due to vibration, wear, or changes in temperature. Their partial cone shape gives these washers spring-like flexibility, so they distribute force and grip tighter than split and tooth lock washers. All meet DIN 432, an international standard for tab washer dimensions.

Steel washers resist wear better than 316 stainless steel, but aren’t as corrosion resistant.

316 stainless steel washers are more corrosion resistant than steel, and nearly as strong. You can expose them to salt water, chlorine solutions, and chemicals without any rusting.

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