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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. 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 | ||||||||
---|---|---|---|---|---|---|---|---|
M1.6 | 1.7 | 3.5 | 0.3-0.4 | Rockwell B75 | DIN 433 | 100 | 000000000 | 00000 |
M1.6 | 1.7 | 4.0 | 0.2-0.4 | Rockwell B75 | DIN 125; ISO 7089 | 100 | 000000000 | 0000 |
316 Stainless Steel | ||||||||
M1.6 | 1.7 | 4.0 | 0.2-0.4 | Not Rated | DIN 125; ISO 7089 | 100 | 000000000 | 0000 |
Zinc-Plated Steel | ||||||||
M1.6 | 1.7 | 4.0 | 0.2-0.4 | Rockwell B75 | DIN 125; ISO 7089 | 100 | 000000000 | 0000 |
Aluminum | ||||||||
M1.6 | 1.7 | 4.0 | 0.2-0.4 | Not Rated | DIN 125; ISO 7089 | 10 | 000000000 | 00000 |
Brass | ||||||||
M1.6 | 1.7 | 3.5 | 0.2-0.4 | Rockwell B76 | DIN 433; ISO 7092 | 100 | 000000000 | 0000 |
M1.6 | 1.7 | 4.0 | 0.2-0.4 | Not Rated | DIN 125; ISO 7089 | 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.
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.
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 | Specifications Met | Pkg. Qty. | Pkg. | |
Hard Fiber | |||||||||
---|---|---|---|---|---|---|---|---|---|
Black | |||||||||
M1.6 | 1.7 | 3.9 | 0.2-0.3 | 230° | Rockwell R70 | DIN 125 | 10 | 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.
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.