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Insulating Sleeve Washers
Cover screw threads to stop electrical current in its tracks and prevent short circuits. These washers create a barrier between the screw threads and the mating surface when mounted in through holes. This barrier also extends the life of your assembly by preventing galvanic corrosion, which is when two different metals rust more quickly due to contact with each other.
Flat Edge
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The flat edge distributes weight evenly to take pressure off screw heads.
Very-High-Temperature Ceramic—Our most heat-resistant washers and the best electrical insulators. These won't melt or become brittle at blistering temperatures up to 1,700° F, making them perfect for ovens, kilns, and furnaces. Ceramic may crack or dent if subjected to hard bumps, however, so these washers are not recommended for high-vibration applications.
Sleeve | Temp. Range | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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For Screw Size | Ht. | OD | ID | OD | Thk. | Overall Ht. | Min. | Max., ° F | Color | Pkg. Qty. | Pkg. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Very-High-Temperature Ceramic | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| No. 6 | 0.062" | 0.281" | 0.150" | 0.500" | 0.125" | 0.187" | Not Rated | 1,700 | Off-White | 5 | 000000000 | 000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| No. 6 | 0.250" | 0.281" | 0.150" | 0.500" | 0.187" | 0.437" | Not Rated | 1,700 | Off-White | 5 | 000000000 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| No. 8 | 0.062" | 0.406" | 0.175" | 0.625" | 0.125" | 0.187" | Not Rated | 1,700 | Off-White | 5 | 000000000 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| No. 8 | 0.250" | 0.406" | 0.175" | 0.625" | 0.218" | 0.468" | Not Rated | 1,700 | Off-White | 5 | 000000000 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| No. 10 | 0.062" | 0.468" | 0.200" | 0.750" | 0.156" | 0.218" | Not Rated | 1,700 | Off-White | 5 | 000000000 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| No. 10 | 0.250" | 0.468" | 0.200" | 0.750" | 0.218" | 0.468" | Not Rated | 1,700 | Off-White | 5 | 000000000 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1/4" | 0.062" | 0.593" | 0.265" | 0.875" | 0.188" | 0.250" | Not Rated | 1,700 | Off-White | 5 | 000000000 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1/4" | 0.250" | 0.593" | 0.265" | 0.875" | 0.250" | 0.500" | Not Rated | 1,700 | Off-White | 5 | 000000000 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| M2 | 2.500 mm | 3.000 mm | 2.100 mm | 4.200 mm | 1.500 mm | 4.000 mm | Not Rated | 1,700 | Off-White | 1 | 000000000 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| M3 | 1.500 mm | 4.000 mm | 3.100 mm | 6.200 mm | 1.500 mm | 3.000 mm | Not Rated | 1,700 | Off-White | 1 | 000000000 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| M3 | 3.500 mm | 4.000 mm | 3.100 mm | 6.200 mm | 1.500 mm | 5.000 mm | Not Rated | 1,700 | Off-White | 1 | 000000000 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| M3 | 7.500 mm | 4.000 mm | 3.100 mm | 6.200 mm | 1.500 mm | 9.000 mm | Not Rated | 1,700 | Off-White | 1 | 000000000 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| M4 | 3.000 mm | 6.000 mm | 4.100 mm | 8.400 mm | 1.500 mm | 4.500 mm | Not Rated | 1,700 | Off-White | 1 | 000000000 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| M4 | 5.000 mm | 6.000 mm | 4.100 mm | 8.400 mm | 1.500 mm | 6.500 mm | Not Rated | 1,700 | Off-White | 1 | 000000000 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| M5 | 3.000 mm | 7.000 mm | 5.100 mm | 10.200 mm | 2.000 mm | 5.000 mm | Not Rated | 1,700 | Off-White | 1 | 000000000 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| M5 | 5.000 mm | 7.000 mm | 5.100 mm | 10.200 mm | 2.000 mm | 7.000 mm | Not Rated | 1,700 | Off-White | 1 | 000000000 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| M6 | 4.000 mm | 8.000 mm | 6.100 mm | 12.200 mm | 2.000 mm | 6.000 mm | Not Rated | 1,700 | Off-White | 1 | 000000000 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| M6 | 10.000 mm | 8.000 mm | 6.100 mm | 12.200 mm | 2.000 mm | 12.000 mm | Not Rated | 1,700 | Off-White | 1 | 000000000 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| M8 | 4.000 mm | 10.000 mm | 8.100 mm | 14.200 mm | 2.500 mm | 6.500 mm | Not Rated | 1,700 | Off-White | 1 | 000000000 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| M8 | 8.000 mm | 10.000 mm | 8.100 mm | 14.200 mm | 2.500 mm | 10.500 mm | Not Rated | 1,700 | Off-White | 1 | 000000000 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Ultra-High-Temperature Ceramic Washers
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Our most heat-resistant washers, even at blistering temperatures up to 3000° F. They distribute pressure evenly under nuts and screws in industrial furnaces, kilns, and other extreme-temperature environments. Ceramic may crack or dent if subjected to hard bumps, however, so these washers are not recommended for high-vibration applications.
Temp. Range | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
For Screw Size | ID | OD | Thk. | Min. | Max., ° F | Specs. Met | Color | Each | ||
| No. 0 | 0.068" | 0.188" | 0.022" to 0.028" | Not Rated | 3,000 | — | Off-White | 000000000 | 00000 | |
| No. 2 | 0.094" | 0.250" | 0.028" to 0.036" | Not Rated | 3,000 | — | Off-White | 000000000 | 0000 | |
| No. 4 | 0.125" | 0.375" | 0.036" to 0.045" | Not Rated | 3,000 | — | Off-White | 000000000 | 0000 | |
| No. 5 | 0.141" | 0.406" | 0.036" to 0.045" | Not Rated | 3,000 | — | Off-White | 000000000 | 0000 | |
| No. 6 | 0.156" | 0.438" | 0.036" to 0.045" | Not Rated | 3,000 | — | Off-White | 000000000 | 0000 | |
| No. 8 | 0.188" | 0.500" | 0.036" to 0.045" | Not Rated | 3,000 | — | Off-White | 000000000 | 0000 | |
| No. 10 | 0.203" | 0.562" | 0.036" to 0.045" | Not Rated | 3,000 | — | Off-White | 000000000 | 0000 | |
| No. 12 | 0.234" | 0.625" | 0.056" to 0.071" | Not Rated | 3,000 | — | Off-White | 000000000 | 0000 | |
| 1/4" | 0.281" | 0.734" | 0.056" to 0.071" | Not Rated | 3,000 | — | Off-White | 000000000 | 0000 | |
| 5/16" | 0.344" | 0.875" | 0.056" to 0.071" | Not Rated | 3,000 | — | Off-White | 000000000 | 0000 | |
| 3/8" | 0.406" | 1.000" | 0.056" to 0.071" | Not Rated | 3,000 | — | Off-White | 000000000 | 0000 | |
| 7/16" | 0.469" | 1.125" | 0.056" to 0.071" | Not Rated | 3,000 | — | Off-White | 000000000 | 0000 | |
| 1/2" | 0.531" | 1.250" | 0.090" to 0.112" | Not Rated | 3,000 | — | Off-White | 000000000 | 0000 | |
| 9/16" | 0.594" | 1.469" | 0.090" to 0.112" | Not Rated | 3,000 | — | Off-White | 000000000 | 0000 | |
| 5/8" | 0.656" | 1.750" | 0.090" to 0.112" | Not Rated | 3,000 | — | Off-White | 000000000 | 0000 | |
| 3/4" | 0.812" | 2.000" | 0.090" to 0.112" | Not Rated | 3,000 | — | Off-White | 000000000 | 00000 | |
| 7/8" | 0.938" | 2.250" | 0.146" to 0.174" | Not Rated | 3,000 | ASME B18.21.1 | Off-White | 000000000 | 00000 | |
| 1" | 1.062" | 2.500" | 0.146" to 0.174" | Not Rated | 3,000 | ASME B18.21.1 | Off-White | 000000000 | 00000 | |
| M2 | 2.6 mm | 6.0 mm | 0.6 mm to 0.9 mm | Not Rated | 3,000 | ASME B18.22M | Off-White | 000000000 | 0000 | |
| M3 | 3.6 mm | 10.0 mm | 0.8 mm to 1.2 mm | Not Rated | 3,000 | ASME B18.22M | Off-White | 000000000 | 0000 | |
| M4 | 4.8 mm | 12.0 mm | 1.0 mm to 1.4 mm | Not Rated | 3,000 | ASME B18.22M | Off-White | 000000000 | 0000 | |
| M5 | 5.6 mm | 15.0 mm | 1.2 mm to 1.8 mm | Not Rated | 3,000 | — | Off-White | 000000000 | 0000 | |
| M6 | 6.8 mm | 18.8 mm | 1.2 mm to 1.8 mm | Not Rated | 3,000 | — | Off-White | 000000000 | 0000 | |
| M8 | 9.0 mm | 25.4 mm | 1.6 mm to 2.3 mm | Not Rated | 3,000 | ASME B18.22M | Off-White | 000000000 | 0000 | |
| M10 | 11.0 mm | 28.0 mm | 2.0 mm to 2.8 mm | Not Rated | 3,000 | ASME B18.22M | Off-White | 000000000 | 0000 | |
| M12 | 13.4 mm | 34.0 mm | 2.5 mm to 3.5 mm | Not Rated | 3,000 | ASME B18.22M | Off-White | 000000000 | 0000 | |
| M14 | 15.4 mm | 39.0 mm | 2.5 mm to 3.5 mm | Not Rated | 3,000 | ASME B18.22M | Off-White | 000000000 | 00000 | |
| M16 | 17.4 mm | 44.0 mm | 3.0 mm to 4.0 mm | Not Rated | 3,000 | ASME B18.22M | Off-White | 000000000 | 00000 | |
| M20 | 22.0 mm | 50.0 mm | 3.5 mm to 4.6 mm | Not Rated | 3,000 | ASME B18.22M | Off-White | 000000000 | 00000 | |
