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Metric General Purpose Washers
Use these metric washers to evenly distribute the load under bolt or screw heads and nuts when fastening. They can also act as spacers.
Stainless steel washers are more corrosion resistant than steel washers, and almost as strong. 18-8 and 17-7 PH stainless steel washers will hold up in humid, damp, and washdown environments, but will corrode if exposed to salt water or chemicals. 17-7 PH stainless steel washers are stronger than 18-8 stainless steel. More corrosion resistant than 18-8 and 17-7 PH stainless steel, 316 stainless steel washers will not corrode from salt water, chlorine solutions, and chemicals.
Steel washers are stronger and more wear resistant than stainless steel washers. Steel washers without a plating or coating are best for dry environments, since moisture will cause them to rust. Zinc- and zinc yellow-chromate plated steel washers have an outer layer of zinc that protects the inner steel from rust and extends the life of the washer. Although they are stronger and more wear resistant than stainless steel, they are not as corrosion resistant. Use them in wet environments, but avoid contact with salt water and chemicals.
Washers that meet ISO 7089, 7090, 7091, and 7092 (formerly DIN 125, 126, and 433), meet international standards for fastener dimensions. The ISO 7091 washers have a slightly rougher surface than a typical flat washer.
For technical drawings and 3-D models, click on a part number.
| For Screw Size  | ID, mm | OD, mm | Thickness, mm | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| M36 | 37.0 | 66.0 | 4.4-5.6 | Not Rated | DIN 125; ISO 7089 | 1 | 000000000 | 00000 |
316 Stainless Steel | ||||||||
| M36 | 37.0 | 66.0 | 4.4-5.6 | Not Rated | DIN 125; ISO 7089 | 1 | 000000000 | 0000 |
Steel | ||||||||
| M36 | 39.0 | 66.0 | 4.0-6.0 | Rockwell B52 | DIN 126; ISO 7091 | 1 | 000000000 | 0000 |
Zinc-Plated Steel | ||||||||
| M36 | 37.0 | 66.0 | 4.4-5.6 | Rockwell B75 | DIN 125; ISO 7089 | 10 | 000000000 | 00000 |
Zinc-Plated Class 8.8 Steel | ||||||||
| M36 | 37.0 | 66.0 | 4.4-5.6 | Rockwell B91 | DIN 125; ISO 7089 | 1 | 000000000 | 0000 |
Metric Oversized Washers
Compared to our general purpose washers, these have exaggerated diameters and/or thicknesses. Use them to cover oversized holes, hold heavy fastening loads, or as spacers and levelers.
Black-oxide steel washers have a matte-black finish that prevents corrosion in dry environments. Blue-dyed steel washers have a unique color so you can tell they're metric at a glance.
Stainless steel washers are more corrosion resistant than steel washers, and almost as strong. Use them in damp and washdown applications without worrying about rust. 18-8 stainless steel and 17-7 PH stainless steel washers have similar qualities to one another, except 17-7 PH stainless steel washers are stronger.
For technical drawings and 3-D models, click on a part number.
Tension-Indicating Washers for Structural Applications
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. They have a galvanized finish, so they 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. They have a zinc-plated finish, so they won’t rust in wet environments.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Galvanized Class 8.8 Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
ASME B18.2.6M/ASTM F959 | ||||||||
| M36 | 37.700mm | 70.360mm | 4.800mm-7.500mm | Rockwell C37 | ASME B18.2.6M; ASTM F959 | 1 | 000000000 | 00000 |
Zinc-Plated Class 10.9 Steel | ||||||||
ASME B18.2.6M/ASTM F959 | ||||||||
| M36 | 37.700mm | 70.360mm | 4.800mm-7.500mm | Rockwell C37 | ASME B18.2.6M; ASTM F959 | 1 | 000000000 | 0000 |
Metric Washers for Structural Applications
These thick washers are designed to support structural screws, studs, and nuts. They meet ISO 7416 (formerly DIN 6916), which is an international standard for washer dimensions. Use them with DIN 6914 structural hex head bolts and DIN 6915 structural hex nuts.
Black steel washers are mildly corrosion resistant in dry environments.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID, mm | OD, mm | Thick., mm | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Black Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| M36 | 37.0 | 66.0 | 5.4-6.6 | Rockwell C45 | DIN 6916, ISO 7416 | 1 | 000000000 | 000000 |
Metric Chemical-Resistant Plastic Washers
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.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID, mm | OD, mm | Thick., mm | Max. Temperature, °F | Hardness | Color | Pkg. Qty. | Pkg. | |
PTFE Plastic | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| M36 | 37.0 | 66.0 | 1.4-1.8 | 500° | Durometer 51D | White | 1 | 000000000 | 00000 |
Metric Water- and Steam-Resistant Plastic Washers
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.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID, mm | OD, mm | Thick., mm | Max. Temperature, °F | Hardness | Color | Pkg. Qty. | Pkg. | |
Delrin® Acetal Plastic | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| M36 | 37.0 | 66.0 | 2.2-2.6 | 180° | Rockwell M90 | White | 1 | 000000000 | 00000 |
Metric Split Lock Washers
As a screw is tightened, these metric 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. They meet a DIN or ASME standard for split lock washer dimensions.
Standard split lock washers have a left-hand helix 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.
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.
Stronger and more durable than stainless steel, steel washers plated with zinc or galvanized withstand varying degrees of corrosion. Zinc-plated steel and zinc yellow-chromate 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.
For technical drawings and 3-D models, click on a part number.
Metric Split Lock Washers for Socket Head Screws
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.
Zinc- and zinc yellow-chromate plated steel washers are corrosion resistant in wet environments.
For technical drawings and 3-D models, click on a part number.
Belleville Spring Lock Washers for Socket Head Screws
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.
Wedge Lock Washers
These two-piece washers provide more locking power than split, tooth, and spring lock washers. Wedges on the inside lock the two pieces together, and serrations on the exterior grip surfaces to resist loosening from high vibration and shifting. Washers are reusable.
316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.
Zinc-flake-coated steel washers are corrosion resistant in wet environments.
316 stainless steel and zinc-flake-coated steel washers are comparable to NORD-LOCK® Series washers.
For technical drawings and 3-D models, click on a part number.
Metal Sealing Washers
Also known as crush washers, these compress when tightened to form a tighter, more durable seal than rubber washers. They are commonly used to seal fluids such as oil and fuel. Washers are not reusable.
Copper washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive. Cellulose-filled copper washers are for low-torque applications since they’re easier to crush than standard copper washers.
Aluminum washers are lightweight and corrosion resistant in wet environments.
For technical drawings and 3-D models, click on a part number.