System of Measurement System of Measurement |
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For Screw Size For Screw Size | Hide |
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Material Material |
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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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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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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Finish Finish |
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Tension Indicated Tension Indicated |
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Split Lock Washer Type Split Lock Washer Type |
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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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![]() | White |
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. 17-7 PH stainless steel washers are stronger than 18-8 stainless steel. Black-oxide 18-8 stainless steel washers have a matte-black finish. 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. Stronger and slightly more corrosion resistant than 316 stainless steel, Bumax 109 stainless steel washers are best for marine environments and chemical-processing plants.
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. Zinc-flake-coated and black corrosion-resistant-coated steel washers have the same level of corrosion resistance—both resist corrosion from chemicals and withstand 1,000 hours of salt spray. The black corrosion-resistant-coated steel washers have a black semi-gloss finish.
At one-third the weight of steel, aluminum washers are the lightest option. They will not rust in wet environments.
In addition to resisting rust in wet environments, copper and brass washers are electrically conductive.
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 | ||||||||
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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 Steel for Class 8.8 | ||||||||
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 | ||||||||
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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 | |||||||||
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M42 | 43.0 | 78.0 | 1.4-1.8 | 500° | Durometer 51D | White | 1 | 000000000 | 000000 |
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. 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.
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.
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 | ||||||||
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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-Oxide Finish | ||||||||
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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
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.
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 | ||||||||||
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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 | |||||||
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M42 | 42.3 | 48.9 | 1.8-2.2 | DIN 7603 | 1 | 000000000 | 000000 |