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Metric 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.
Phenolic washers have low moisture absorption, so they won’t expand or become brittle over time. Color ranges from red-brown to yellow-brown.
Hard fiber washers are resistant to organic solvents and petroleum-based oils. They meet the dimensional standards of DIN 125, but not all meet the thickness requirement.
Polypropylene washers resist organic solvents and degreasing agents.
For technical drawings and 3-D models, click on a part number.
| For Screw Size  | ID, mm | OD, mm | Thick., mm | Max. Temperature, °F | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Glass-Filled Nylon Plastic | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Black | |||||||||
| M3 | 3.2 | 7.0 | __ | 220° | Rockwell M111 | UL 94 HB | 10 | 000000000 | 00000 |
| M4 | 4.3 | 9.0 | __ | 220° | Rockwell M111 | UL 94 HB | 10 | 000000000 | 0000 |
| M5 | 5.3 | 10.0 | __ | 220° | Rockwell M111 | UL 94 HB | 10 | 000000000 | 0000 |
| M6 | 6.4 | 12.5 | __ | 220° | Rockwell M111 | UL 94 HB | 10 | 000000000 | 0000 |
| M8 | 8.4 | 17.0 | __ | 220° | Rockwell M111 | UL 94 HB | 5 | 000000000 | 0000 |
| M10 | 10.5 | 21.0 | __ | 220° | Rockwell M111 | UL 94 HB | 5 | 000000000 | 0000 |
White | |||||||||
| M3 | 3.2 | 7.0 | __ | 220° | Rockwell M111 | UL 94 HB | 10 | 000000000 | 0000 |
| M4 | 4.3 | 9.0 | __ | 220° | Rockwell M111 | UL 94 HB | 10 | 000000000 | 0000 |
| M5 | 5.3 | 10.0 | __ | 220° | Rockwell M111 | UL 94 HB | 10 | 000000000 | 0000 |
| M6 | 6.4 | 12.5 | __ | 220° | Rockwell M111 | UL 94 HB | 10 | 000000000 | 0000 |
| M8 | 8.4 | 17.0 | __ | 220° | Rockwell M111 | UL 94 HB | 5 | 000000000 | 0000 |
| M10 | 10.5 | 21.0 | __ | 220° | Rockwell M111 | UL 94 HB | 5 | 000000000 | 0000 |
| M12 | 13 | 24.0 | __ | 220° | Rockwell M111 | UL 94 HB | 5 | 000000000 | 0000 |
| M16 | 17 | 30.0 | __ | 220° | Rockwell M111 | UL 94 HB | 1 | 000000000 | 0000 |
Phenolic Plastic | |||||||||
Brown | |||||||||
| M2 | 2.2 | 5.0 | 0.7-0.9 | 250° | Rockwell M95 | __ | 10 | 000000000 | 00000 |
| M3 | 3.2 | 6.8 | 0.4-0.6 | 250° | Rockwell M105 | __ | 10 | 000000000 | 00000 |
| M3.5 | 3.7 | 7.8 | 0.4-0.6 | 250° | Rockwell M105 | __ | 10 | 000000000 | 00000 |
| M4 | 4.3 | 9.0 | 0.7-0.9 | 250° | Rockwell M95 | __ | 10 | 000000000 | 00000 |
| M5 | 5.3 | 11.0 | 0.9-1.1 | 250° | Rockwell M95 | __ | 10 | 000000000 | 00000 |
| M6 | 6.4 | 12.0 | 1.4-1.7 | 250° | Rockwell M95 | __ | 10 | 000000000 | 00000 |
| M8 | 8.4 | 15.8 | 1.4-1.7 | 250° | Rockwell M105 | __ | 10 | 000000000 | 00000 |
| M12 | 13 | 23.7 | 2.2-2.5 | 250° | Rockwell M105 | __ | 10 | 000000000 | 00000 |
| M14 | 15 | 27.7 | 2.2-2.5 | 250° | Rockwell M105 | __ | 5 | 000000000 | 0000 |
Hard Fiber | |||||||||
Black | |||||||||
| M1.2 | 1.3 | 3.8 | 0.2-0.3 | 230° | Rockwell R70 | DIN 125 | 10 | 000000000 | 00000 |
| M1.4 | 1.5 | 3.8 | 0.2-0.3 | 230° | Rockwell R70 | DIN 125 | 10 | 000000000 | 00000 |
| M1.6 | 1.7 | 3.9 | 0.2-0.3 | 230° | Rockwell R70 | DIN 125 | 10 | 000000000 | 00000 |
| M2 | 2.3 | 5.0 | 0.3-0.4 | 230° | Rockwell R70 | DIN 125 | 25 | 000000000 | 00000 |
| M2.5 | 2.7 | 6.5 | 0.4-0.6 | 230° | Not Rated | DIN 125 | 100 | 000000000 | 00000 |
| M3 | 3.2 | 7.0 | 0.4-0.6 | 230° | Not Rated | DIN 125 | 100 | 000000000 | 00000 |
| M3.5 | 3.7 | 7.8 | 0.5-0.6 | 230° | Rockwell R70 | DIN 125 | 10 | 000000000 | 00000 |
| M4 | 4.3 | 9.0 | 0.7-0.9 | 230° | Not Rated | DIN 125 | 100 | 000000000 | 00000 |
| M6 | 6.4 | 12.5 | 1.4-1.7 | 230° | Not Rated | DIN 125 | 50 | 000000000 | 0000 |
| M7 | 7.4 | 13.8 | 1.4-1.7 | 230° | Rockwell R70 | DIN 125 | 10 | 000000000 | 00000 |
| M8 | 8.4 | 17.0 | 1.4-1.7 | 230° | Not Rated | DIN 125 | 50 | 000000000 | 0000 |
| M10 | 10.5 | 21.0 | 1.8-2.2 | 230° | Rockwell R50 | DIN 125 | 50 | 000000000 | 00000 |
| M12 | 13 | 24.0 | 2.1-2.5 | 230° | Rockwell R50 | DIN 125 | 50 | 000000000 | 00000 |
| M16 | 17 | 30.0 | 2.1-2.5 | 230° | Rockwell R50 | DIN 125 | 25 | 000000000 | 0000 |
| M20 | 21 | 37.0 | 2.1-2.5 | 230° | Rockwell R50 | DIN 125 | 25 | 000000000 | 00000 |
| M24 | 25 | 44.0 | 2.8-3.5 | 230° | Rockwell R50 | DIN 125 | 10 | 000000000 | 0000 |
| M30 | 31 | 56.0 | 2.8-3.6 | 230° | Rockwell R50 | DIN 125 | 10 | 000000000 | 00000 |
Polypropylene Plastic | |||||||||
Off-White | |||||||||
| M2 | 2.2 | 5.0 | 0.7-0.9 | 150° | Rockwell R85 | __ | 10 | 000000000 | 0000 |
| M3 | 3.2 | 8.0 | 0.7-0.9 | 150° | Rockwell R85 | __ | 10 | 000000000 | 0000 |
| M4 | 4.3 | 9.0 | 0.7-1.0 | 150° | Rockwell R100 | __ | 10 | 000000000 | 0000 |
| M5 | 5.3 | 10.0 | 0.9-1.2 | 150° | Rockwell R100 | __ | 10 | 000000000 | 0000 |
| M6 | 6.4 | 12.5 | 1.4-1.9 | 150° | Rockwell R100 | __ | 10 | 000000000 | 0000 |
| M7 | 7.4 | 16.0 | 1.4-1.7 | 150° | Rockwell R85 | __ | 10 | 000000000 | 0000 |
| M8 | 8.4 | 17.0 | 1.4-1.9 | 150° | Rockwell R100 | __ | 10 | 000000000 | 00000 |
| M10 | 10.5 | 21.0 | 1.7-2.3 | 150° | Rockwell R100 | __ | 5 | 000000000 | 0000 |
| M12 | 13 | 24.0 | 2.2-2.8 | 150° | Rockwell R100 | __ | 5 | 000000000 | 0000 |
| M14 | 15.1 | 28.0 | 2.2-2.5 | 150° | Rockwell R85 | __ | 5 | 000000000 | 0000 |
| M16 | 17 | 30.0 | 3.0-3.3 | 150° | Rockwell R101 | __ | 5 | 000000000 | 0000 |
| M18 | 19 | 34.0 | 3.0-3.3 | 150° | Rockwell R101 | __ | 5 | 000000000 | 0000 |
| M20 | 21.2 | 37.0 | 3.0-3.3 | 150° | Rockwell R85 | __ | 5 | 000000000 | 00000 |