About Washers
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Metric Single-Wave Washers
Stainless Steel
Bronze
Black Steel
These curved, flexible washers act like springs to compensate for tolerance variations and uneven surfaces. You can also use them to damp vibration.
18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.
Bronze washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.
Steel washers are harder and hold their shape better than stainless steel washers, but aren’t as corrosion resistant. They have a black finish from heat treatment.
For technical drawings and 3-D models, click on a part number.
| For Screw Size  | ID, mm | OD, mm | Thick., mm | Overall Ht., mm | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| M2.5 | 2.7 | 5.0 | 0.3 | 1.4 | Not Rated | DIN 137B | 50 | 000000000 | 000000 |
| M3 | 3.2 | 8.0 | 0.5 | 1.6 | Not Rated | DIN 137B | 100 | 000000000 | 0000 |
| M3.5 | 3.7 | 8.0 | 0.5 | 1.8 | Not Rated | DIN 137B | 100 | 000000000 | 00000 |
| M4 | 4.3 | 9.0 | 0.5 | 2.0 | Not Rated | DIN 137B | 100 | 000000000 | 0000 |
| M5 | 5.3 | 11.0 | 0.5 | 2.2 | Not Rated | DIN 137B | 100 | 000000000 | 0000 |
| M6 | 6.4 | 12.0 | 0.5 | 2.6 | Not Rated | DIN 137B | 100 | 000000000 | 0000 |
| M8 | 8.4 | 15.0 | 0.8 | 3.0 | Not Rated | DIN 137B | 50 | 000000000 | 0000 |
| M10 | 10.5 | 21.0 | 1.0 | 4.2 | Not Rated | DIN 137B | 25 | 000000000 | 0000 |
| M12 | 13.0 | 24.0 | 1.2 | 5.0 | Not Rated | DIN 137B | 10 | 000000000 | 0000 |
| M14 | 15.0 | 28.0 | 1.6 | 6.0 | Not Rated | DIN 137B | 10 | 000000000 | 00000 |
| M16 | 17.0 | 30.0 | 1.6 | 6.4 | Not Rated | DIN 137B | 10 | 000000000 | 0000 |
| M18 | 19.0 | 34.0 | 1.6 | 6.6 | Not Rated | DIN 137B | 10 | 000000000 | 00000 |
| M20 | 21.0 | 36.0 | 1.6 | 7.4 | Not Rated | DIN 137B | 5 | 000000000 | 0000 |
| M24 | 25.0 | 44.0 | 1.8 | 8.2 | Not Rated | DIN 137B | 5 | 000000000 | 00000 |
Bronze | |||||||||
| M3 | 3.2 | 8.0 | 0.5 | 1.6 | Not Rated | DIN 137B | 25 | 000000000 | 00000 |
| M4 | 4.3 | 9.0 | 0.5 | 2.0 | Not Rated | DIN 137B | 25 | 000000000 | 00000 |
| M5 | 5.3 | 11.0 | 0.5 | 2.2 | Not Rated | DIN 137B | 10 | 000000000 | 0000 |
| M6 | 6.4 | 12.0 | 0.5 | 2.6 | Not Rated | DIN 137B | 10 | 000000000 | 0000 |
| M8 | 8.4 | 15.0 | 0.8 | 3.0 | Not Rated | DIN 137B | 5 | 000000000 | 0000 |
| M10 | 10.5 | 21.0 | 1.0 | 4.2 | Not Rated | DIN 137B | 1 | 000000000 | 0000 |
| M12 | 13.0 | 24.0 | 1.2 | 5.0 | Not Rated | DIN 137B | 1 | 000000000 | 0000 |
Black-Oxide Steel | |||||||||
| M3 | 3.2 | 8.0 | 0.5 | 1.6 | Rockwell C42 | DIN 137B | 100 | 000000000 | 0000 |
| M4 | 4.3 | 9.0 | 0.5 | 2.0 | Rockwell C42 | DIN 137B | 100 | 000000000 | 0000 |
| M5 | 5.3 | 11.0 | 0.5 | 2.2 | Rockwell C42 | DIN 137B | 100 | 000000000 | 0000 |
| M6 | 6.4 | 12.0 | 0.5 | 2.6 | Rockwell C42 | DIN 137B | 100 | 000000000 | 0000 |
| M7 | 7.4 | 14.0 | 0.8 | 3.0 | Rockwell C42 | DIN 137B | 100 | 000000000 | 00000 |
| M8 | 8.4 | 15.0 | 0.8 | 3.0 | Rockwell C42 | DIN 137B | 100 | 000000000 | 00000 |
| M10 | 10.5 | 21.0 | 1.0 | 4.2 | Rockwell C42 | DIN 137B | 100 | 000000000 | 00000 |
| M12 | 13.0 | 24.0 | 1.2 | 5.0 | Rockwell C42 | DIN 137B | 25 | 000000000 | 0000 |
| M14 | 15.0 | 28.0 | 1.6 | 6.0 | Rockwell C42 | DIN 137B | 25 | 000000000 | 00000 |
| M16 | 17.0 | 30.0 | 1.6 | 6.4 | Rockwell C42 | DIN 137B | 25 | 000000000 | 00000 |
| M20 | 21.0 | 36.0 | 1.6 | 7.4 | Rockwell C42 | DIN 137B | 10 | 000000000 | 0000 |
| M24 | 25.0 | 44.0 | 1.8 | 8.2 | Rockwell C42 | DIN 137B | 5 | 000000000 | 00000 |