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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 | ||||||||
---|---|---|---|---|---|---|---|---|
M39 | 40.0 | 72.0 | 5.4-6.6 | Not Rated | DIN 125; ISO 7089 | 1 | 000000000 | 00000 |
316 Stainless Steel | ||||||||
M39 | 40.0 | 72.0 | 5.4-6.6 | Not Rated | DIN 125; ISO 7089 | 1 | 000000000 | 00000 |
Steel | ||||||||
M39 | 42.0 | 72.0 | 5.0-7.0 | Rockwell B52 | DIN 126; ISO 7091 | 1 | 000000000 | 0000 |
Zinc-Plated Steel | ||||||||
M39 | 40.0 | 72.0 | 5.4-6.6 | Rockwell B75 | DIN 125; ISO 7090 | 1 | 000000000 | 0000 |
Zinc-Plated Class 8.8 Steel | ||||||||
M39 | 40.0 | 72.0 | 5.4-6.6 | Rockwell B91 | DIN 125; ISO 7089 | 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 | |||||||||
---|---|---|---|---|---|---|---|---|---|
M39 | 40.0 | 72.0 | 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.
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. | |
Fiberglass | |||||||||
---|---|---|---|---|---|---|---|---|---|
M39 | 40.0 | 72.0 | 1.4-1.8 | 280° | Rockwell M115 | Light Green | 1 | 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.