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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.
Nylon washers may expand when exposed to moisture.
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. | |
Nylon Plastic | |||||||||||||
No. 4 | 0.115" | 0.305" | 0.245" | 0.117" | 0.040" | 0.157" | -40° | 180° | Rockwell R120 | Off-White | 100 | 000000000 | 00000 |
No. 6 | 0.140" | 0.360" | 0.300" | 0.142" | 0.040" | 0.182" | -40° | 180° | Rockwell R120 | Off-White | 100 | 000000000 | 0000 |
No. 8 | 0.171" | 0.414" | 0.354" | 0.166" | 0.040" | 0.206" | -40° | 180° | Rockwell R120 | Off-White | 100 | 000000000 | 00000 |
No. 10 | 0.194" | 0.470" | 0.410" | 0.190" | 0.040" | 0.230" | -40° | 180° | Rockwell R120 | Off-White | 100 | 000000000 | 00000 |
1/4" | 0.257" | 0.595" | 0.535" | 0.247" | 0.042" | 0.289" | -40° | 180° | Rockwell R120 | Off-White | 100 | 000000000 | 00000 |
Ceramic | |||||||||||||
No. 4 | 0.130" | 0.440" | 0.250" | 0.125" | 0.100" | 0.225" | Not Rated | 1700° | Rockwell C73 | Off-White | 1 | 000000000 | 0000 |
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 | 00000 |