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General Purpose Washers
Use these washers to evenly distribute the load under bolt or screw heads and nuts when fastening. They can also act as spacers.
Copper, brass, and silicon bronze washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive. Silicon bronze washers are stronger than copper and brass.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID | OD | Thick. | Hardness | Pkg. Qty. | Pkg. | |
Silicon Bronze | |||||||
|---|---|---|---|---|---|---|---|
| No. 6 | 0.147" | 0.375" | 0.025" to 0.039" | Not Rated | 100 | 000000000 | 00000 |
| No. 8 | 0.172" | 0.375" | 0.025" to 0.039" | Not Rated | 100 | 000000000 | 0000 |
| No. 10 | 0.200" | 0.438" | 0.029" to 0.043" | Not Rated | 100 | 000000000 | 0000 |
| No. 12 | 0.228" | 0.500" | 0.033" to 0.047" | Not Rated | 50 | 000000000 | 0000 |
| 1/4" | 0.260" | 0.688" | 0.033" to 0.047" | Not Rated | 50 | 000000000 | 00000 |
| 5/16" | 0.340" | 0.750" | 0.055" to 0.069" | Not Rated | 25 | 000000000 | 00000 |
| 5/16" | 0.340" | 0.875" | 0.055" to 0.069" | Not Rated | 10 | 000000000 | 0000 |
| 3/8" | 0.392" | 0.875" | 0.055" to 0.069" | Not Rated | 25 | 000000000 | 00000 |
| 3/8" | 0.392" | 1.000" | 0.055" to 0.069" | Not Rated | 10 | 000000000 | 0000 |
| 7/16" | 0.500" | 1.125" | 0.055" to 0.069" | Not Rated | 10 | 000000000 | 00000 |
| 1/2" | 0.562" | 1.250" | 0.071" to 0.085" | Not Rated | 10 | 000000000 | 00000 |
| 5/8" | 0.688" | 1.500" | 0.084" to 0.098" | Not Rated | 5 | 000000000 | 00000 |
| 3/4" | 0.812" | 1.875" | 0.095" to 0.109" | Not Rated | 1 | 000000000 | 0000 |
| 7/8" | 0.938" | 2.250" | 0.107" to 0.121" | Not Rated | 1 | 000000000 | 0000 |
| 1" | 1.062" | 2.500" | 0.121" to 0.135" | Not Rated | 1 | 000000000 | 00000 |
Split Lock Washers
As a screw is tightened, these washers flatten to add tension to the joint, counteracting fatigue around the joint from small amounts of vibration. This makes them a common choice to prevent fasteners from loosening. However, they resist the least amount of vibration compared to other locking washers.
These washers are compatible with fasteners that have right-hand threads to prevent loosening. The uneven split ends bite into fasteners for a tight grip, but they won’t work with hardened surfaces. These washers hold better than curved or wave washers. They are not reusable after tightening.
Silicon Bronze washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.
Washers that meet ASME B18.21.1 adhere to strict dimensional standards.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Silicon Bronze | ||||||||
|---|---|---|---|---|---|---|---|---|
| No. 2 | 0.094" | 0.172" | 0.020" | Rockwell B90 | ASME B18.21.1 | 100 | 000000000 | 00000 |
| No. 3 | 0.107" | 0.195" | 0.025" | Rockwell B90 | ASME B18.21.1 | 100 | 000000000 | 0000 |
| No. 4 | 0.120" | 0.209" | 0.025" | Rockwell B90 | ASME B18.21.1 | 100 | 000000000 | 0000 |
| No. 4 | 0.120" | 0.209" | 0.025" | Rockwell B90 | ASME B18.21.1 | 1,000 | 000000000 | 00000 |
| No. 6 | 0.148" | 0.250" | 0.031" | Rockwell B90 | ASME B18.21.1 | 100 | 000000000 | 0000 |
| No. 6 | 0.148" | 0.250" | 0.031" | Rockwell B90 | ASME B18.21.1 | 1,000 | 000000000 | 00000 |
| No. 8 | 0.174" | 0.293" | 0.040" | Rockwell B90 | ASME B18.21.1 | 100 | 000000000 | 0000 |
| No. 8 | 0.174" | 0.293" | 0.040" | Rockwell B90 | ASME B18.21.1 | 1,000 | 000000000 | 00000 |
| No. 10 | 0.200" | 0.334" | 0.047" | Rockwell B90 | ASME B18.21.1 | 100 | 000000000 | 0000 |
| No. 12 | 0.227" | 0.377" | 0.056" | Rockwell B90 | ASME B18.21.1 | 100 | 000000000 | 0000 |
| 1/4" | 0.260" | 0.487" | 0.062" | Rockwell B90 | ASME B18.21.1 | 100 | 000000000 | 00000 |
| 5/16" | 0.322" | 0.583" | 0.078" | Rockwell B90 | ASME B18.21.1 | 50 | 000000000 | 00000 |
| 3/8" | 0.385" | 0.680" | 0.094" | Rockwell B90 | ASME B18.21.1 | 25 | 000000000 | 00000 |
| 7/16" | 0.450" | 0.776" | 0.109" | Rockwell B90 | ASME B18.21.1 | 10 | 000000000 | 0000 |
| 1/2" | 0.512" | 0.869" | 0.125" | Rockwell B90 | ASME B18.21.1 | 10 | 000000000 | 0000 |
| 5/8" | 0.641" | 1.073" | 0.156" | Rockwell B90 | ASME B18.21.1 | 5 | 000000000 | 0000 |
| 3/4" | 0.766" | 1.265" | 0.188" | Rockwell B90 | ASME B18.21.1 | 5 | 000000000 | 00000 |
| 1" | 1.024" | 1.656" | 0.250" | Rockwell B90 | ASME B18.21.1 | 5 | 000000000 | 00000 |
Metric Split Lock Washers
As a screw is tightened, these metric washers flatten to add tension to the joint, counteracting fatigue around the joint from small amounts of vibration. This makes them a common choice to prevent fasteners from loosening. However, they resist the least amount of vibration compared to other locking washers. They meet a DIN or ASME standard for split lock washer dimensions.
Standard split lock washers have a left-hand helix that have right-hand threads to prevent loosening. They have uneven split ends that bite into fasteners for a tight grip but won’t work with hardened surfaces. They hold better than curved or wave washers. These washers are not reusable after tightening.
Silicon Bronze washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID, mm | OD, mm | Thick., mm | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Silicon Bronze | ||||||||
|---|---|---|---|---|---|---|---|---|
Standard | ||||||||
| M3 | 3.4 | 6.2 | 0.7-0.9 | Rockwell B90 | DIN 127B | 100 | 000000000 | 000000 |
| M4 | 4.4 | 7.6 | 0.8-1.0 | Rockwell B90 | DIN 127B | 100 | 000000000 | 00000 |
| M5 | 5.4 | 9.2 | 1.1-1.3 | Rockwell B90 | DIN 127B | 100 | 000000000 | 00000 |
| M6 | 6.5 | 11.8 | 1.5-1.7 | Rockwell B90 | DIN 127B | 50 | 000000000 | 00000 |
| M8 | 8.5 | 14.8 | 1.9-2.1 | Rockwell B90 | DIN 127B | 25 | 000000000 | 00000 |
| M10 | 10.7 | 18.1 | 2.0-2.4 | Rockwell B90 | DIN 127B | 10 | 000000000 | 0000 |