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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. 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. 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 | ||||||||
|---|---|---|---|---|---|---|---|---|
| M7 | 7.4 | 14.0 | 1.4-1.8 | Rockwell B80 | DIN 125; ISO 7089 | 100 | 000000000 | 000000 |
316 Stainless Steel | ||||||||
| M7 | 7.4 | 14.0 | 1.4-1.8 | Not Rated | DIN 125; ISO 7089 | 100 | 000000000 | 00000 |
Zinc-Plated Steel | ||||||||
| M7 | 7.4 | 14.0 | 1.4-1.8 | Rockwell B75 | DIN 125; ISO 7089 | 100 | 000000000 | 0000 |
| M7 | 7.4 | 22.0 | 1.8-2.2 | Not Rated | DIN 9021 | 25 | 000000000 | 0000 |
Black Corrosion-Resistant-Coated Steel | ||||||||
| M7 | 7.4 | 14.0 | 1.4-1.8 | Rockwell B75 | DIN 125; ISO 7089 | 5 | 000000000 | 0000 |
Aluminum | ||||||||
| M7 | 7.4 | 14.0 | 1.4-1.8 | Not Rated | DIN 125; ISO 7089 | 10 | 000000000 | 00000 |
Brass | ||||||||
| M7 | 7.4 | 14.0 | 1.4-1.8 | Not Rated | DIN 125; ISO 7089 | 10 | 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.
Plain steel washers are stronger, more wear resistant, and less costly than zinc-plated steel and stainless steel washers. They should not be used in wet or corrosive environments because they easily rust. 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. Black-oxide 18-8 stainless steel washers resist corrosion just as well as regular 18-8 stainless steel washers and have a matte-black finish. 316 stainless steel washers stand up to salt water, chlorine solutions, and other chemicals without rusting. Passivated stainless steel washers have added protection against oxidation and corrosion.
Washers that meet DIN and ISO specifications meet international standards for washer dimensions. ISO 8738 is formerly DIN 1440. ISO 7093 is formerly DIN 9021. Washers that meet DIN 1440 are also known as shaft washers and washers for clevis pins.
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 | ||||||||
|---|---|---|---|---|---|---|---|---|
| M7 | 7.0 | 14.0 | 1.3-1.7 | Rockwell B76 | DIN 1440, ISO 8738 | 100 | 000000000 | 00000 |
Passivated 18-8 Stainless Steel | ||||||||
| M7 | 7.4 | 22.0 | 1.8-2.2 | Rockwell B75 | DIN 9021 | 25 | 000000000 | 00000 |
Black-Oxide 18-8 Stainless Steel | ||||||||
| M7 | 7.4 | 22.0 | 1.8-2.2 | Rockwell B68 | DIN 9021 | 10 | 000000000 | 00000 |
Passivated 316 Stainless Steel | ||||||||
| M7 | 7.4 | 22.0 | 1.8-2.2 | Rockwell B75 | DIN 9021 | 10 | 000000000 | 0000 |
Metric Plastic Washers
These plastic washers are good electrical insulators.
Nylon washers are stronger than polycarbonate and UHMW washers. Exposure to moisture may cause them to expand. Lubricant-filled nylon washers have a slippery surface that resists wear in high-friction applications.
UHMW washers have excellent moisture and abrasion resistance and good resistance to chemicals.
For technical drawings and 3-D models, click on a part number.
Temperature Range, °F | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Screw Size | ID, mm | OD, mm | Thick., mm | Min. | Max. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Nylon Plastic | ||||||||||
Black | ||||||||||
| M7 | 7.4 | 14.0 | 1.4-1.8 | -40° | 212° | Rockwell R120 | DIN 125 | 5 | 000000000 | 00000 |
Off-White | ||||||||||
| M7 | 7.4 | 14.0 | 1.4-1.8 | -40° | 212° | Rockwell R120 | DIN 125 | 5 | 000000000 | 0000 |
Lubricant-Filled Nylon Plastic | ||||||||||
Gray | ||||||||||
| M7 | 7.4 | 14.0 | 1.4-1.8 | Not Rated | 220° | Rockwell M75 | DIN 125 | 5 | 000000000 | 0000 |
UHMW Plastic | ||||||||||
Off-White | ||||||||||
| M7 | 7.4 | 14.0 | 1.5-1.7 | Not Rated | 180° | Not Rated | __ | 5 | 000000000 | 0000 |
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.
PVC washers resist acids and alkalies.
For technical drawings and 3-D models, click on a part number.
Metric Electrical-Insulating Plastic Washers
These washers are excellent electrical insulators.
Hard fiber washers are resistant to organic solvents and petroleum-based oils. They meet the dimensional standards of DIN 125, but not all meet the thickness requirement.
Polypropylene washers resist organic solvents and degreasing agents.
For technical drawings and 3-D models, click on a part number.
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 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| M7 | 7.4 | 15.0 | 1.4-1.8 | 180° | Rockwell M90 | White | 10 | 000000000 | 000000 |
Metric High-Temperature Plastic Washers
Able to withstand temperatures as high as 450° or 500° F, these are among the most heat resistant plastic washers we carry. They have good resistance to moisture and chemicals.
PEEK washers have excellent tensile strength for high-stress applications.
Carbon-filled PEEK washers are stronger and more moisture resistant than PEEK washers.
Ultem PEI washers are flame retardant, UV stable, and can be used outdoors. They also offer excellent electrical-insulating properties.
For technical drawings and 3-D models, click on a part number.
Temperature Range, °F | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For Screw Size | ID, mm | OD, mm | Thick., mm | Min. | Max. | Hardness | Specifications Met | Choose a Color | Pkg. Qty. | Pkg. | |
PEEK Plastic | |||||||||||
| M7 | 7.5 | 14.0 | 1.4-1.8 | -20° | 500° | Rockwell M103 | DIN 125 | 10 | 000000000 | 00000 | |
Carbon-Filled PEEK Plastic | |||||||||||
| M7 | 7.5 | 14.0 | 1.4-1.8 | -20° | 500° | Rockwell M103 | DIN 125 | Black | 10 | 000000000 | 0000 |
Ultem PEI Plastic | |||||||||||
| M7 | 7.5 | 14.0 | 1.4-1.8 | -30° | 450° | Rockwell M114 | DIN 125 | Black | 10 | 000000000 | 0000 |
Self-Retaining Washers
Specially shaped tabs grip your screw shank tightly. All of these washers are good electrical insulators.
Polyethylene washers are softer, more flexible, and withstand moisture better than nylon washers. They are not as wear resistant.
For technical drawings and 3-D models, click on a part number.
Temperature Range, °F | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Screw Size | ID | OD | Thick. | Min. | Max. | Hardness | Color | Pkg. Qty. | Pkg. | |
Polyethylene Plastic | ||||||||||
| M7 | 0.331" | 0.512" | 0.100"-0.112" | 35° | 145° | Durometer 43D | Gray | 100 | 000000000 | 000000 |
| M7 | 0.331" | 0.591" | 0.053"-0.065" | 35° | 145° | Durometer 43D | Blue | 100 | 000000000 | 00000 |
| M7 | 0.331" | 0.669" | 0.073"-0.085" | 35° | 145° | Durometer 43D | Red | 100 | 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 loosening. 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.
For technical drawings and 3-D models, click on a part number.
Belleville Spring Lock Washers
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.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Overall Ht. | Hardness | Pkg. Qty. | Pkg. | |
Black-Oxide Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| M7 | 7.200mm | 14.000mm | 0.500mm | 0.900mm | Rockwell C38 | 5 | 000000000 | 00000 |
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.
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.
| For Screw Size | ID | OD | Thick. | Overall Ht. | Hardness | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| M7 | 0.291" | 0.472" | 0.028" | 0.051" | Rockwell C38 | 5 | 000000000 | 000000 |
Metric External-Tooth Lock Washers
Teeth on the outside edge of these washers bite into the screw head and joint for a tight grip. Use with fasteners that have heads large enough to make contact with the teeth, such as pan, button, and binding head screws.
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.
Metric Internal-Tooth Lock Washers
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 resist corrosion 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.
Metric Single-Wave Washers
These curved, flexible washers act like springs to compensate for tolerance variations and uneven surfaces. You can also use them to damp vibration.
Steel washers are harder and hold their shape better than stainless steel washers, but aren’t as corrosion resistant. They have a black finish from heat treatment.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID, mm | OD, mm | Thick., mm | Overall Ht., mm | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Oxide Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| M7 | 7.4 | 14.0 | 0.8 | 3.0 | Rockwell C42 | DIN 137B | 100 | 000000000 | 000000 |
Nonmarring Encased Neodymium Magnets with Unthreaded Hole
A rubber cover protects the mounting surface as well as the magnet, and a steel case concentrates and focuses the magnetic field. Made of neodymium, these rare earth magnets are the strongest for their size.
Warning: Maximum pull ratings are based on direct contact with rust-free and unpainted iron plate. Variations in material condition will significantly reduce these ratings. Do not use for lifting over people.
