USS washers generally have a larger ID and OD than SAE washers.

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

18-8 stainless steel washers have good chemical resistance and may be mildly magnetic. Black-oxide washers have a matte-black finish.

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

Hot-dipped galvanized steel washers are 10 times as corrosion resistant as zinc-plated washers.

Black corrosion-resistant-coated steel washers resist chemicals and withstand 1,000 hours of salt spray.

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Designed for use with structural screws, studs, and nuts, these washers are often used for construction and exterior building applications.

Hot-dipped galvanized washers are corrosion resistant in wet environments.

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

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

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As a screw is tightened, these washers flatten to add tension to the joint, counteracting fatigue around the joint from small amounts of vibration. This makes 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.

Black-oxide steel washers are mildly corrosion resistant in dry environments.

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

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

Zinc- and zinc yellow-chromate plated steel washers are corrosion resistant in wet environments.

Washers that meet ASME B18.21.1 adhere to strict dimensional standards.

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Choose these washers for their adherence to strict military standards for material and construction. As a screw is tightened, they flatten to add tension to the joint and prevent loosening from small amounts of vibration.

Cadmium- and zinc yellow-chromate plated steel washers are corrosion resistant in wet environments.

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Compared to standard split lock washers, these are thicker and have larger outside diameters. As the screw is tightened, these washers flatten to add tension to the joint. They counteract fatigue around the joint caused by small amounts of vibration, making them a popular choice for preventing fasteners from loosening. However, they resist the least amount of vibration compared to other locking washers.

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

All washers adhere to strict ASME dimensional standards. Steel washers also meet the standard for material properties.

Steel washers are known for their strength. Zinc yellow-chromate plated steel washers resist corrosion in wet environments.

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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. Load-rated Belleville disc springs are also available.

Zinc-plated steel washers have an outer layer of zinc that protects the inner steel from rust in wet environments and extends the life of the washer.

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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.

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