SAE washers generally have a smaller ID and OD than USS 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 18-8 stainless steel washers have a matte-black finish.

Zinc-plated, zinc yellow-chromate plated, and chrome-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 and zinc-flake-coated steel washers resist chemicals and withstand 1,000 hours of salt spray.

In addition to resisting rust in wet environments, copper and brass washers are electrically conductive. At one-third the weight of steel, aluminum washers are the lightest option. They will not rust in wet environments.

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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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Designed for use with A325 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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When you’ve applied the correct tension, these washers release an orange dye as a visual indicator.

ASTM F959 Type A325 washers are designed for use with A325 structural screws, studs, and nuts and are often used for construction and exterior building applications. They’re not for use with higher tensile strength bolting. Galvanized A325 washers have excellent corrosion resistance.

ASTM F959 Type A490 washers have greater tensile strength than A325 washers to handle more weight and stress. They’re useful for high-weight structural applications, such as roofs, foundations, beams, and scaffolding. Pair them with ASTM A490 bolts.

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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.

PVC washers resist acids and alkalies.

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These washers are excellent electrical insulators.

Hard fiber washers resist organic solvents and petroleum-based oils.

Polypropylene washers resist organic solvents and degreasing agents.

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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.

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

Passivated stainless steel washers have added protection against oxidation and corrosion. Cadmium- and zinc yellow-chromate plated steel washers are corrosion resistant in wet environments.

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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 are corrosion resistant in wet environments.

Washers that meet ASME B18.21.1 adhere to strict dimensional standards. The zinc-plated steel washers also meet standards for material properties.

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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.

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.