System of Measurement System of Measurement |
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For Screw Size For Screw Size | Show |
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For Screw Size For Screw Size | Hide |
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Material Material |
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Finish Finish |
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Thickness Thickness |
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Washer Type Washer Type |
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| Flat | Split Lock |
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| Spring Lock | Tab Lock |
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| Tension Indicating | Wedge Lock |
Hardness Hardness |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Fastener Strength Grade/Class Fastener StrengthGrade/Class  |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Tension Indicated Tension Indicated |
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Spring Lock Washer Shape Spring Lock Washer Shape |
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 | Conical |
Serration Location Serration Location |
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Maximum Temperature Maximum Temperature |
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Minimum Temperature Minimum Temperature |
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Color Color |
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For Bearing Nut Face Style For Bearing Nut Face Style |
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About Washers
More
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.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-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 | Thick., mm | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| M42 | 43.0 | 78.0 | 6.0-8.0 | Not Rated | DIN 125, ISO 7089 | 1 | 000000000 | 00000 |
316 Stainless Steel | ||||||||
| M42 | 43.0 | 78.0 | 6.0-8.0 | Not Rated | DIN 125, ISO 7089 | 1 | 000000000 | 00000 |
Steel | ||||||||
| M42 | 45.0 | 78.0 | 5.8-8.2 | Rockwell B52 | DIN 126, ISO 7091 | 1 | 000000000 | 0000 |
Zinc-Plated Steel | ||||||||
| M42 | 43.0 | 78.0 | 6.0-8.0 | Rockwell B75 | DIN 125, ISO 7090 | 1 | 000000000 | 0000 |
Zinc-Plated Class 8.8 Steel | ||||||||
| M42 | 43.0 | 78.0 | 6.0-8.0 | Rockwell B91 | DIN 125, ISO 7089 | 1 | 000000000 | 00000 |
Tension-Indicating Washers for Structural Applications
When you’ve applied the correct tension, these washers release an orange dye as a visual indicator.
Class 10.9 washers are stronger than Class 8.8 washers.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Class 10.9 Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
ASME B18.2.6M/ASTM F959 | ||||||||
| M42 | 44.600mm | 82.000mm | 4.800mm-7.500mm | Rockwell C37 | ASME B18.2.6M; ASTM F959 | 1 | 000000000 | 00000 |
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 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| M42 | 43.0 | 78.0 | 1.4-1.8 | 500° | Durometer 51D | White | 1 | 000000000 | 000000 |
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.
Fiberglass washers are stronger than Delrin® acetal plastic washers and have excellent resistance to salt water. Color ranges from light green to light tan.
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.
Metric Split Lock Washers
As you tighten a bolt, these metric washers flatten to add tension to the threaded joint and prevent loosening from small amounts of vibration. All of these washers meet a DIN or ASME standard for split lock washer dimensions.
Standard split lock washers have a left-hand helix, which means you can only use them with bolts that have right-hand threads to prevent clockwise rotation from vibration. When tightened, their uneven split ends bite into unhardened nuts and bolts for a tighter hold than curved or wave washers, but only for applications with clockwise rotation. The washers, nuts, and bolts will be deformed when untightened, so none of them can be reused. Do not use these washers on hardened surfaces.
Use zinc-plated and yellow zinc-plated steel washers in mostly dry environments. The zinc plating offers temporary rust protection, but once it wears away the steel will rust. All of these washers are stronger and more wear resistant than stainless steel.
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. | |
Zinc-Plated Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
Standard | ||||||||
| M42 | 43.7 | 68.2 | 6.8-7.2 | Rockwell C44 | DIN 127B | 1 | 000000000 | 000000 |
Metric Split Lock Washers for Socket Head Screws
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.
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. | |
Steel with Black Finish | ||||||||
|---|---|---|---|---|---|---|---|---|
| M42 | 43.7 | 60.2 | 7.7-8.3 | Rockwell C44 | DIN 7980 | 1 | 000000000 | 000000 |
Spring Lock Washers for Slotted Bearing Nuts
Designed for use with bearing nuts, these lock washers have a conical shape that presses like a spring against bearings, bushings, gears, and pulleys to hold them in place on your threaded shaft or spindle. They also have an inner tab that sits in the shaft or spindle’s keyway to prevent the nut from loosening. Made of steel, they’re strong and flexible.
DIN 462 and DIN 5406 washers meet international standards for lock washer dimensions. Pair DIN 462 washers with DIN 1804 bearing nuts, and DIN 5406 washers with DIN 981 bearing nuts.
For technical drawings and 3-D models, click on a part number.
Tab | |||||||||||
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| For Screw Size | ID, mm | OD, mm | Thick., mm | Wd., mm | Dp., mm | Overall Ht., mm | Hardness | Specifications Met | For Bearing Nut Specifications Met | Each | |
Steel | |||||||||||
For Stepped Nuts | |||||||||||
| M42 | 42.0 | 62.0 | 1.20 | 8.0 | 2.5 | 5.0 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 00000 |
Wedge Lock Washers
Also known as NORD-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.
For technical drawings and 3-D models, click on a part number.
Metric Tab Lock Washers
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.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID, mm | OD, mm | Overall Ht., mm | Thick., mm | Tab Wd., mm | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| M42 | 43 | 88 | 11 | 2 | 11 | Rockwell B50 | DIN 432 | 1 | 000000000 | 00000 |
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.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID, mm | OD, mm | Thick., mm | Specifications Met | Pkg. Qty. | Pkg. | |
Copper | |||||||
|---|---|---|---|---|---|---|---|
| M42 | 42.3 | 48.9 | 1.8-2.2 | DIN 7603 | 1 | 000000000 | 000000 |