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Finish Washer
These washers are tapered in the middle to fit a flat or oval head screw. They are used mostly for their finished appearance. They are sometimes used to distribute the load across a larger area.
Other Names: Countersunk Washer, Finishing Washer
Typical Dimensions
No standard
| Nominal Dia. | Actual ID | OD | Height |
|---|---|---|---|
| No. 4 | 0.113 - 0.150 | 0.334 - 0.375 | 0.078 - 0.103 |
| No. 6 | 0.161 - 0.200 | 0.424 - 0.496 | 0.078 - 0.103 |
| No. 8 | 0.180 - 0.220 | 0.518 - 0.543 | 0.086 - 0.110 |
| No. 10 | 0.235 - 0.279 | 0.581 - 0.606 | 0.103 - 0.126 |
| No. 12 | 0.259 - 0.299 | 0.656 - 0.704 | 0.113 - 0.138 |
| 1/4 | 0.305 - 0.338 | 0.762 - 0.794 | 0.125 - 0.156 |
| 5/16 | 0.373 - 0.409 | 0.864 - 0.938 | 0.141 - 0.188 |
| 3/8 | 0.425 - 0.460 | 0.950 - 1.062 | 0.190 - 0.220 |