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ASME Designation ASME Designation | Show |
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For Screw Size For Screw Size |
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Material Material |
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Finish Finish |
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OD OD |
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ID ID |
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Washer Type Washer Type |
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 | Flat |
Thickness Thickness |
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Specifications Met Specifications Met |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Hardness Hardness |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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About Washers
More
ASME Washers for Soft Material
Also known as Type B washers, these distribute your fastener's load over a larger surface area than other washers to limit damage to soft materials.
18-8 stainless steel washers have excellent corrosion resistance in most environments and may be mildly magnetic.
Zinc-plated steel washers are corrosion resistant in wet environments.
316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ASME Designation | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| No. 0 | Narrow | 0.068" | 0.125" | 0.022"-0.028" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 00000 |
| No. 1 | Narrow | 0.084" | 0.156" | 0.022"-0.028" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |
| No. 2 | Narrow | 0.094" | 0.188" | 0.022"-0.028" | Not Rated | ASME B18.21.1 | 25 | 000000000 | 00000 |
| No. 4 | Narrow | 0.125" | 0.250" | 0.028"-0.036" | Not Rated | ASME B18.21.1 | 25 | 000000000 | 00000 |
| No. 6 | Narrow | 0.156" | 0.312" | 0.028"-0.036" | Not Rated | ASME B18.21.1 | 25 | 000000000 | 0000 |
| No. 8 | Narrow | 0.188" | 0.375" | 0.036"-0.045" | Not Rated | ASME B18.21.1 | 25 | 000000000 | 00000 |
| No. 10 | Narrow | 0.203" | 0.406" | 0.036"-0.045" | Not Rated | ASME B18.21.1 | 25 | 000000000 | 00000 |
| 1/4" | Narrow | 0.281" | 0.500" | 0.056"-0.071" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |
| 5/16" | Narrow | 0.344" | 0.625" | 0.056"-0.071" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |
| 3/8" | Narrow | 0.406" | 0.734" | 0.056"-0.071" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 00000 |
| 7/16" | Narrow | 0.469" | 0.875" | 0.056"-0.071" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 0000 |
| 1/2" | Narrow | 0.531" | 1.000" | 0.056"-0.071" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 0000 |
| 9/16" | Narrow | 0.594" | 1.125" | 0.056"-0.071" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 0000 |
| 5/8" | Narrow | 0.656" | 1.250" | 0.090"-0.112" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| 3/4" | Narrow | 0.812" | 1.375" | 0.090"-0.112" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| 7/8" | Narrow | 0.938" | 1.469" | 0.090"-0.112" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| 1" | Narrow | 1.062" | 1.750" | 0.090"-0.112" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| 1 1/8" | Narrow | 1.188" | 2.000" | 0.090"-0.112" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| 1 1/4" | Narrow | 1.313" | 2.250" | 0.146"-0.174" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| M2.5 | Narrow | 3.100mm | 5.900mm | 0.600mm-0.900mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M3 | Narrow | 3.500mm | 6.700mm | 0.600mm-0.900mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M4 | Narrow | 4.700mm | 9.800mm | 0.800mm-1.200mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M5 | Narrow | 5.600mm | 10.600mm | 1.000mm-1.400mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M6 | Narrow | 6.700mm | 12.700mm | 1.200mm-1.750mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M10 | Narrow | 10.900mm | 19.800mm | 1.600mm-2.300mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M12 | Narrow | 13.400mm | 24.900mm | 2.000mm-2.800mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M16 | Narrow | 17.400mm | 31.700mm | 2.500mm-3.500mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M20 | Narrow | 21.900mm | 38.400mm | 3.000mm-4.000mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M30 | Narrow | 32.500mm | 55.500mm | 4.000mm-5.100mm | Not Rated | ASME B18.22M | 1 | 000000000 | 00000 |
316 Stainless Steel | |||||||||
| No. 0 | Narrow | 0.068" | 0.125" | 0.022"-0.028" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |
| No. 1 | Narrow | 0.084" | 0.156" | 0.022"-0.028" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |
| No. 2 | Narrow | 0.094" | 0.188" | 0.022"-0.028" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |
| No. 4 | Narrow | 0.125" | 0.250" | 0.028"-0.036" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |
| No. 6 | Narrow | 0.156" | 0.312" | 0.028"-0.036" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |
| No. 8 | Narrow | 0.188" | 0.375" | 0.036"-0.045" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |
| No. 10 | Narrow | 0.203" | 0.406" | 0.036"-0.045" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |
| 1/4" | Narrow | 0.281" | 0.500" | 0.056"-0.071" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |
| 5/16" | Narrow | 0.344" | 0.625" | 0.056"-0.071" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |
| 3/8" | Narrow | 0.406" | 0.734" | 0.056"-0.071" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |
| 7/16" | Narrow | 0.469" | 0.875" | 0.056"-0.071" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| 1/2" | Narrow | 0.531" | 1.000" | 0.056"-0.071" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |
| 9/16" | Narrow | 0.594" | 1.125" | 0.056"-0.071" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| 5/8" | Narrow | 0.656" | 1.250" | 0.090"-0.112" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| 3/4" | Narrow | 0.812" | 1.375" | 0.090"-0.112" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| 7/8" | Narrow | 0.938" | 1.469" | 0.090"-0.112" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| 1" | Narrow | 1.062" | 1.750" | 0.090"-0.112" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| 1 1/8" | Narrow | 1.188" | 2.000" | 0.090"-0.112" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| 1 1/4" | Narrow | 1.313" | 2.250" | 0.146"-0.174" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 00000 |
| M2.5 | Narrow | 3.100mm | 5.900mm | 0.600mm-0.900mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M3 | Narrow | 3.500mm | 6.700mm | 0.600mm-0.900mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M4 | Narrow | 4.700mm | 9.800mm | 0.800mm-1.200mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M5 | Narrow | 5.600mm | 10.600mm | 1.000mm-1.400mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M6 | Narrow | 6.700mm | 12.700mm | 1.200mm-1.750mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M10 | Narrow | 10.900mm | 19.800mm | 1.600mm-2.300mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M12 | Narrow | 13.400mm | 24.900mm | 2.000mm-2.800mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M14 | Narrow | 15.300mm | 27.700mm | 2.000mm-2.800mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M16 | Narrow | 17.400mm | 31.700mm | 2.500mm-3.500mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
Zinc-Plated Steel | |||||||||
| No. 0 | Narrow | 0.068" | 0.125" | 0.022"-0.028" | Rockwell B40 | ASME B18.21.1 | 25 | 000000000 | 0000 |
| No. 1 | Narrow | 0.084" | 0.156" | 0.022"-0.028" | Not Rated | ASME B18.21.1 | 25 | 000000000 | 0000 |
| No. 2 | Narrow | 0.094" | 0.188" | 0.022"-0.028" | Rockwell B40 | ASME B18.21.1 | 50 | 000000000 | 0000 |
| No. 4 | Narrow | 0.125" | 0.250" | 0.028"-0.036" | Rockwell B40 | ASME B18.21.1 | 50 | 000000000 | 0000 |
| No. 6 | Narrow | 0.156" | 0.312" | 0.028"-0.036" | Rockwell B40 | ASME B18.21.1 | 50 | 000000000 | 0000 |
| No. 8 | Narrow | 0.188" | 0.375" | 0.036"-0.045" | Rockwell B40 | ASME B18.21.1 | 25 | 000000000 | 0000 |
| No. 10 | Narrow | 0.203" | 0.406" | 0.036"-0.045" | Rockwell B40 | ASME B18.21.1 | 25 | 000000000 | 0000 |
| 1/4" | Narrow | 0.281" | 0.500" | 0.056"-0.071" | Rockwell B40 | ASME B18.21.1 | 25 | 000000000 | 0000 |
| 5/16" | Narrow | 0.344" | 0.625" | 0.056"-0.071" | Rockwell B40 | ASME B18.21.1 | 25 | 000000000 | 0000 |
| 3/8" | Narrow | 0.406" | 0.734" | 0.056"-0.071" | Rockwell B40 | ASME B18.21.1 | 25 | 000000000 | 0000 |
| 7/16" | Narrow | 0.469" | 0.875" | 0.056"-0.071" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |
| 1/2" | Narrow | 0.531" | 1.000" | 0.056"-0.071" | Rockwell B40 | ASME B18.21.1 | 5 | 000000000 | 0000 |
| 9/16" | Narrow | 0.594" | 1.125" | 0.056"-0.071" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |
| 5/8" | Narrow | 0.656" | 1.250" | 0.090"-0.112" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 0000 |
| 3/4" | Narrow | 0.812" | 1.375" | 0.090"-0.112" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 0000 |
| 7/8" | Narrow | 0.938" | 1.469" | 0.090"-0.112" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 0000 |
| 1" | Narrow | 1.062" | 1.750" | 0.090"-0.112" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| 1 1/8" | Narrow | 1.188" | 2.000" | 0.090"-0.112" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| 1 1/4" | Narrow | 1.313" | 2.250" | 0.146"-0.174" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| M3 | Narrow | 3.500mm | 6.800mm | 0.600mm-0.900mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M4 | Narrow | 4.800mm | 9.700mm | 0.800mm-1.200mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M5 | Narrow | 5.600mm | 10.700mm | 1.000mm-1.400mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M6 | Narrow | 6.700mm | 12.700mm | 1.200mm-1.750mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M10 | Narrow | 10.900mm | 19.700mm | 1.600mm-2.300mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M12 | Narrow | 13.400mm | 24.900mm | 2.000mm-2.800mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M16 | Narrow | 17.400mm | 31.700mm | 2.500mm-3.500mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M20 | Narrow | 22.000mm | 38.700mm | 3.000mm-4.000mm | Not Rated | ASME B18.22M | 1 | 000000000 | 0000 |
| M30 | Narrow | 32.500mm | 55.500mm | 4.000mm-5.100mm | Not Rated | ASME B18.22M | 1 | 000000000 | 00000 |