System of Measurement System of Measurement |
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ID ID |
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OD OD |
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Thickness Thickness |
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For Screw Size For Screw Size |
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Washer Type Washer Type |
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 | Flat |
Material Material |
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Maximum Temperature Maximum Temperature |
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Minimum Temperature Minimum Temperature |
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Hardness Hardness |
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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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Filler Material Filler Material |
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Specifications Met Specifications Met |
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About Washers
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Electrical-Insulating Plastic Washers
These washers are excellent electrical insulators.
Glass-filled nylon washers are reinforced with glass for increased strength. Exposure to moisture may cause them to expand.
Hard fiber washers resist organic solvents and petroleum-based oils.
Polypropylene washers resist organic solvents and degreasing agents.
Phenolic washers have low moisture absorption, so they won’t expand or become brittle over time. Color ranges from red-brown to yellow-brown.
For technical drawings and 3-D models, click on a part number.
Temperature Range, °F | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For Screw Size | ID | OD | Thick. | Min. | Max. | Hardness | Specifications Met | Color | Pkg. Qty. | Pkg. | |
Glass-Filled Nylon Plastic | |||||||||||
| No. 2 | 0.090" | 0.250" | 0.062"-0.067" | -20° | 230° | Rockwell M96 | __ | Off-White | 5 | 000000000 | 00000 |
| No. 4 | 0.115" | 0.250" | 0.062"-0.067" | -20° | 230° | Rockwell M96 | __ | Off-White | 5 | 000000000 | 0000 |
| No. 6 | 0.140" | 0.312" | 0.062"-0.067" | -20° | 230° | Rockwell M96 | __ | Off-White | 10 | 000000000 | 0000 |
| No. 8 | 0.170" | 0.375" | 0.062"-0.067" | -20° | 230° | Rockwell M96 | __ | Off-White | 10 | 000000000 | 0000 |
| No. 10 | 0.190" | 0.375" | 0.062"-0.067" | -20° | 230° | Rockwell M96 | __ | Off-White | 10 | 000000000 | 0000 |
| 1/4" | 0.255" | 0.500" | 0.062"-0.067" | -20° | 230° | Rockwell M96 | __ | Off-White | 10 | 000000000 | 0000 |
| 5/16" | 0.317" | 0.500" | 0.062"-0.067" | -20° | 230° | Rockwell M96 | __ | Off-White | 5 | 000000000 | 0000 |
| 3/8" | 0.380" | 0.625" | 0.062"-0.067" | -20° | 230° | Rockwell M96 | __ | Off-White | 5 | 000000000 | 0000 |
| 7/16" | 0.443" | 0.750" | 0.062"-0.067" | -20° | 230° | Rockwell M96 | __ | Off-White | 5 | 000000000 | 0000 |
| 1/2" | 0.505" | 0.750" | 0.062"-0.067" | -20° | 230° | Rockwell M96 | __ | Off-White | 5 | 000000000 | 0000 |
| 9/16" | 0.590" | 0.866" | 0.062"-0.067" | -20° | 230° | Rockwell M96 | __ | Off-White | 5 | 000000000 | 0000 |
| 5/8" | 0.650" | 1.000" | 0.062"-0.067" | -20° | 230° | Rockwell M96 | __ | Off-White | 5 | 000000000 | 0000 |
| 3/4" | 0.805" | 1.250" | 0.062"-0.067" | -20° | 230° | Rockwell M96 | __ | Off-White | 5 | 000000000 | 0000 |
Hard Fiber | |||||||||||
| No. 2 | 0.094" | 0.250" | 0.010"-0.020" | Not Rated | 230° | Rockwell R70 | __ | Black | 100 | 000000000 | 00000 |
| No. 2 | 0.094" | 0.250" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 0000 |
| No. 2 | 0.094" | 0.250" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| No. 4 | 0.125" | 0.250" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 0000 |
| No. 4 | 0.125" | 0.250" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| No. 4 | 0.125" | 0.312" | 0.010"-0.020" | Not Rated | 230° | Rockwell R70 | __ | Black | 100 | 000000000 | 00000 |
| No. 6 | 0.145" | 0.375" | 0.026"-0.036" | Not Rated | 230° | Rockwell R70 | __ | Black | 100 | 000000000 | 00000 |
| No. 6 | 0.156" | 0.312" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 0000 |
| No. 6 | 0.156" | 0.312" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| No. 8 | 0.172" | 0.375" | 0.026"-0.036" | Not Rated | 230° | Rockwell R70 | __ | Black | 100 | 000000000 | 00000 |
| No. 8 | 0.188" | 0.375" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 0000 |
| No. 8 | 0.188" | 0.375" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| No. 10 | 0.203" | 0.375" | 0.042"-0.052" | Not Rated | 230° | Rockwell R70 | __ | Black | 100 | 000000000 | 00000 |
| No. 10 | 0.203" | 0.438" | 0.041"-0.051" | Not Rated | 230° | Rockwell R70 | __ | Black | 100 | 000000000 | 00000 |
| No. 12 | 0.234" | 0.500" | 0.042"-0.052" | Not Rated | 230° | Rockwell R70 | __ | Black | 50 | 000000000 | 0000 |
| 1/4" | 0.250" | 0.375" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 0000 |
| 1/4" | 0.250" | 0.375" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| 1/4" | 0.250" | 0.500" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 0000 |
| 1/4" | 0.250" | 0.500" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| 1/4" | 0.281" | 0.625" | 0.057"-0.067" | Not Rated | 230° | Rockwell R70 | ASME B18.21.1 | Black | 25 | 000000000 | 00000 |
| 5/16" | 0.312" | 0.438" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 0000 |
| 5/16" | 0.312" | 0.438" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| 5/16" | 0.312" | 0.562" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 0000 |
| 5/16" | 0.312" | 0.562" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| 5/16" | 0.325" | 0.688" | 0.057"-0.067" | Not Rated | 230° | Rockwell R70 | __ | Black | 100 | 000000000 | 00000 |
| 3/8" | 0.375" | 0.500" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 0000 |
| 3/8" | 0.375" | 0.500" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| 3/8" | 0.375" | 0.625" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 0000 |
| 3/8" | 0.375" | 0.625" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| 3/8" | 0.375" | 2.250" | 0.120"-0.130" | Not Rated | 230° | Rockwell R70 | __ | Gray | 10 | 000000000 | 00000 |
| 3/8" | 0.406" | 0.875" | 0.088"-0.098" | Not Rated | 230° | Rockwell R70 | __ | Black | 25 | 000000000 | 00000 |
| 7/16" | 0.438" | 0.625" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 50 | 000000000 | 0000 |
| 7/16" | 0.438" | 0.625" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| 1/2" | 0.500" | 0.625" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| 1/2" | 0.500" | 0.688" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 0000 |
| 1/2" | 0.500" | 0.688" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| 1/2" | 0.500" | 0.750" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 0000 |
| 1/2" | 0.500" | 0.750" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| 1/2" | 0.500" | 2.250" | 0.120"-0.130" | Not Rated | 230° | Rockwell R70 | __ | Gray | 10 | 000000000 | 00000 |
| 1/2" | 0.531" | 1.000" | 0.088"-0.098" | Not Rated | 230° | Rockwell R70 | __ | Black | 25 | 000000000 | 00000 |
| 9/16" | 0.562" | 0.812" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 00000 |
| 9/16" | 0.562" | 0.812" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| 5/8" | 0.625" | 0.750" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| 5/8" | 0.625" | 0.875" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 50 | 000000000 | 0000 |
| 5/8" | 0.625" | 0.875" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| 5/8" | 0.625" | 2.250" | 0.120"-0.130" | Not Rated | 230° | Rockwell R70 | __ | Gray | 10 | 000000000 | 00000 |
| 5/8" | 0.645" | 1.063" | 0.088"-0.098" | Not Rated | 230° | Rockwell R70 | __ | Black | 25 | 000000000 | 00000 |
| 5/8" | 0.688" | 0.938" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| 3/4" | 0.750" | 1.000" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 0000 |
| 3/4" | 0.750" | 1.000" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| 3/4" | 0.750" | 1.063" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 0000 |
| 3/4" | 0.750" | 2.250" | 0.120"-0.130" | Not Rated | 230° | Rockwell R70 | __ | Gray | 10 | 000000000 | 00000 |
| 3/4" | 0.810" | 1.125" | 0.120"-0.130" | Not Rated | 230° | Rockwell R70 | __ | Black | 10 | 000000000 | 00000 |
| 3/4" | 0.812" | 1.125" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 0000 |
| 3/4" | 0.812" | 1.125" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 50 | 000000000 | 0000 |
| 7/8" | 0.875" | 1.188" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 0000 |
| 7/8" | 0.875" | 1.188" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 00000 |
| 7/8" | 0.875" | 2.250" | 0.120"-0.130" | Not Rated | 230° | Rockwell R70 | __ | Gray | 10 | 000000000 | 00000 |
| 7/8" | 0.930" | 1.250" | 0.120"-0.130" | Not Rated | 230° | Rockwell R70 | __ | Black | 10 | 000000000 | 00000 |
| 7/8" | 0.938" | 1.250" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 50 | 000000000 | 0000 |
| 1" | 1.000" | 1.250" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 100 | 000000000 | 0000 |
| 1" | 1.000" | 1.250" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 00000 |
| 1" | 1.000" | 2.250" | 0.120"-0.130" | Not Rated | 230° | Rockwell R70 | __ | Gray | 10 | 000000000 | 00000 |
| 1" | 1.031" | 1.312" | 0.014"-0.016" | Not Rated | 230° | Not Rated | __ | Gray | 50 | 000000000 | 00000 |
| 1" | 1.031" | 1.312" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 50 | 000000000 | 0000 |
| 1" | 1.125" | 2.000" | 0.120"-0.130" | Not Rated | 230° | Rockwell R70 | __ | Black | 10 | 000000000 | 0000 |
| 1 1/4" | 1.250" | 1.625" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 50 | 000000000 | 00000 |
| 1 1/4" | 1.312" | 2.125" | 0.120"-0.130" | Not Rated | 230° | Rockwell R70 | __ | Black | 5 | 000000000 | 0000 |
| 1 1/8" | 1.188" | 1.562" | 0.028"-0.034" | Not Rated | 230° | Not Rated | __ | Red | 100 | 000000000 | 00000 |
Polypropylene Plastic | |||||||||||
| No. 0 | 0.065" | 0.188" | 0.008"-0.012" | Not Rated | 150° | Rockwell R85 | __ | Off-White | 5 | 000000000 | 0000 |
| No. 2 | 0.090" | 0.250" | 0.028"-0.034" | Not Rated | 150° | Rockwell R85 | __ | Off-White | 5 | 000000000 | 0000 |
| No. 4 | 0.120" | 0.250" | 0.028"-0.034" | Not Rated | 150° | Rockwell R85 | __ | Off-White | 5 | 000000000 | 0000 |