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About Washers
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Electrical-Insulating Sleeve Washers

Also known as shoulder or insulator washers, these nonmetal washers block electrical current and prevent galvanic corrosion from mating different types of metal.
Ceramic washers withstand high temperatures and resist moisture as well as hydrochloric and nitric acid gases.
For technical drawings and 3-D models, click on a part number.
Temperature Range, °F | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For Screw Size | ID | OD | Sleeve OD | Thick. | Overall Ht. | Min. | Max. | Color | Pkg. Qty. | Pkg. | |
Ceramic | |||||||||||
| No. 6 | 0.150" | 0.500" | 0.281" | 0.125" | 0.187" | Not Rated | 1700° | Off-White | 5 | 000000000 | 000000 |
| No. 6 | 0.150" | 0.500" | 0.281" | 0.187" | 0.437" | Not Rated | 1700° | Off-White | 5 | 000000000 | 00000 |
| No. 8 | 0.175" | 0.625" | 0.406" | 0.125" | 0.187" | Not Rated | 1700° | Off-White | 5 | 000000000 | 00000 |
| No. 8 | 0.175" | 0.625" | 0.406" | 0.218" | 0.468" | Not Rated | 1700° | Off-White | 5 | 000000000 | 00000 |
| No. 10 | 0.200" | 0.750" | 0.468" | 0.156" | 0.218" | Not Rated | 1700° | Off-White | 5 | 000000000 | 00000 |
| No. 10 | 0.200" | 0.750" | 0.468" | 0.218" | 0.468" | Not Rated | 1700° | Off-White | 5 | 000000000 | 00000 |
| 1/4" | 0.265" | 0.875" | 0.593" | 0.188" | 0.250" | Not Rated | 1700° | Off-White | 5 | 000000000 | 00000 |
| 1/4" | 0.265" | 0.875" | 0.593" | 0.250" | 0.500" | Not Rated | 1700° | Off-White | 5 | 000000000 | 00000 |
| M2 | 2.100mm | 4.200mm | 3.000mm | 1.500mm | 4.000mm | Not Rated | 1700° | Off-White | 1 | 000000000 | 0000 |
| M3 | 3.100mm | 6.200mm | 4.000mm | 1.500mm | 3.000mm | Not Rated | 1700° | Off-White | 1 | 000000000 | 0000 |
| M3 | 3.100mm | 6.200mm | 4.000mm | 1.500mm | 5.000mm | Not Rated | 1700° | Off-White | 1 | 000000000 | 0000 |
| M3 | 3.100mm | 6.200mm | 4.000mm | 1.500mm | 9.000mm | Not Rated | 1700° | Off-White | 1 | 000000000 | 0000 |
| M4 | 4.100mm | 8.400mm | 6.000mm | 1.500mm | 4.500mm | Not Rated | 1700° | Off-White | 1 | 000000000 | 0000 |
| M4 | 4.100mm | 8.400mm | 6.000mm | 1.500mm | 6.500mm | Not Rated | 1700° | Off-White | 1 | 000000000 | 0000 |
| M5 | 5.100mm | 10.200mm | 7.000mm | 2.000mm | 5.000mm | Not Rated | 1700° | Off-White | 1 | 000000000 | 0000 |
| M5 | 5.100mm | 10.200mm | 7.000mm | 2.000mm | 7.000mm | Not Rated | 1700° | Off-White | 1 | 000000000 | 0000 |
| M6 | 6.100mm | 12.200mm | 8.000mm | 2.000mm | 6.000mm | Not Rated | 1700° | Off-White | 1 | 000000000 | 0000 |
| M6 | 6.100mm | 12.200mm | 8.000mm | 2.000mm | 12.000mm | Not Rated | 1700° | Off-White | 1 | 000000000 | 0000 |
| M8 | 8.100mm | 14.200mm | 10.000mm | 2.500mm | 6.500mm | Not Rated | 1700° | Off-White | 1 | 000000000 | 0000 |
| M8 | 8.100mm | 14.200mm | 10.000mm | 2.500mm | 10.500mm | Not Rated | 1700° | Off-White | 1 | 000000000 | 0000 |
Electrical-Insulating Cup Sleeve Washers

These washers have a flat bottom and high walls to protect metal screw heads from electrical current and prevent galvanic corrosion from mating different types of metal.
Ceramic washers withstand high temperatures and resist moisture as well as hydrochloric and nitric acid gases.
For technical drawings and 3-D models, click on a part number.
Temperature Range, °F | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Screw Size | ID | OD | Cup ID | Inside Dp. | Thick. | Overall Ht. | Min. | Max. | Hardness | Color | Pkg. Qty. | Pkg. | |
Ceramic | |||||||||||||
| No. 4 | 0.130" | 0.440" | 0.250" | 0.125" | 0.100" | 0.225" | Not Rated | 1700° | Rockwell C73 | Off-White | 1 | 000000000 | 00000 |
| No. 6 | 0.160" | 0.500" | 0.312" | 0.150" | 0.100" | 0.250" | Not Rated | 1700° | Rockwell C73 | Off-White | 1 | 000000000 | 0000 |
| No. 8 | 0.180" | 0.560" | 0.375" | 0.170" | 0.100" | 0.270" | Not Rated | 1700° | Rockwell C73 | Off-White | 1 | 000000000 | 0000 |
| No. 10 | 0.200" | 0.625" | 0.437" | 0.190" | 0.100" | 0.290" | Not Rated | 1700° | Rockwell C73 | Off-White | 1 | 000000000 | 0000 |
| 1/4" | 0.260" | 0.750" | 0.531" | 0.250" | 0.100" | 0.350" | Not Rated | 1700° | Rockwell C73 | Off-White | 1 | 000000000 | 0000 |


























