About Washers
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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.
18-8 stainless steel and 17-7 PH stainless steel washers have good chemical resistance and may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
| For Screw Size  | ID | OD | Thick. | Hardness | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|
| No. 15 | 0.297" | 0.625" | 0.036" to 0.044" | Rockwell B68 | 100 | 000000000 | 000000 |
Plastic Washers for Rigid Insulation
Plastic washers resist moisture, chemicals, and friction and are good electrical insulators. These have a large surface that distributes holding pressure to reduce the likelihood of crushing insulation.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Max. Temperature, °F | Specifications Met | Color | Pkg. Qty. | Pkg. | |
Polypropylene Plastic | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| No. 12, No. 14, No. 15 | 0.190" | 3.000" | 0.260" | 150° | FM Approved | White | 25 | 000000000 | 000000 |
Steel Washers for Rigid Insulation
Steel washers provide a stronger bearing surface than plastic washers. These have a large surface that distributes holding pressure to reduce the likelihood of crushing insulation.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | Wd. | Thick. | Pkg. Qty. | Pkg. | |
Steel | ||||||
|---|---|---|---|---|---|---|
| No. 12, No. 14, 1/4", No. 15 | 0.270" | 2.875" | 0.019" | 50 | 000000000 | 000000 |
Triple-Wave Washers
With three points of surface contact, these washers provide more stability than single-wave washers. They are curved and flexible to act like springs, compensating 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.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Overall Ht. | Hardness | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/4", No. 15, No. 16, No. 18, 5/16" | 0.328" | 0.682" | 0.010" | 0.073" | Not Rated | 10 | 000000000 | 000000 |