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Maximum Thickness Maximum Thickness |
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About Washers
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Water- and Steam-Resistant Plastic Washers
Low moisture absorption and good heat resistance make these washers suitable for wet and harsh environments. All are good electrical insulators.
Delrin® acetal plastic washers combine a slippery, wear-resistant surface with good strength and rigidity.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Max. Temperature, °F | Hardness | Specifications Met | Color | Pkg. Qty. | Pkg. | |
Delrin® Acetal Plastic | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| No. 0 | 0.050" | 0.190" | 0.020"-0.030" | 180° | Rockwell R120 | __ | White | 50 | 000000000 | 000000 |
| No. 2 | 0.094" | 0.188" | 0.026"-0.036" | 180° | Not Rated | __ | White | 50 | 000000000 | 00000 |
| No. 4 | 0.120" | 0.250" | 0.026"-0.036" | 180° | Not Rated | __ | White | 50 | 000000000 | 00000 |
| No. 5 | 0.140" | 0.410" | 0.030"-0.050" | 180° | Rockwell R120 | __ | White | 50 | 000000000 | 00000 |
| No. 6 | 0.150" | 0.375" | 0.026"-0.036" | 180° | Not Rated | __ | White | 50 | 000000000 | 00000 |
| No. 8 | 0.175" | 0.375" | 0.026"-0.036" | 180° | Not Rated | __ | White | 50 | 000000000 | 00000 |
| No. 10 | 0.203" | 0.438" | 0.026"-0.036" | 180° | Not Rated | __ | White | 50 | 000000000 | 00000 |
| No. 12 | 0.250" | 0.562" | 0.051"-0.080" | 180° | Rockwell R120 | ASME B18.21.1 | White | 50 | 000000000 | 00000 |
| 1/4" | 0.265" | 0.500" | 0.026"-0.036" | 180° | Not Rated | __ | White | 50 | 000000000 | 00000 |
| 5/16" | 0.328" | 0.562" | 0.026"-0.036" | 180° | Not Rated | __ | White | 25 | 000000000 | 0000 |
| 3/8" | 0.390" | 0.625" | 0.026"-0.036" | 180° | Not Rated | __ | White | 25 | 000000000 | 0000 |
| 7/16" | 0.469" | 0.922" | 0.051"-0.080" | 180° | Rockwell R120 | ASME B18.21.1 | White | 50 | 000000000 | 00000 |
| 1/2" | 0.515" | 0.885" | 0.057"-0.067" | 180° | Not Rated | __ | White | 10 | 000000000 | 0000 |
| 9/16" | 0.594" | 1.156" | 0.074"-0.121" | 180° | Rockwell R120 | ASME B18.21.1 | White | 10 | 000000000 | 0000 |
| 5/8" | 0.640" | 1.062" | 0.057"-0.067" | 180° | Not Rated | __ | White | 10 | 000000000 | 0000 |
| 3/4" | 0.765" | 1.312" | 0.057"-0.067" | 180° | Not Rated | __ | White | 10 | 000000000 | 0000 |
| 7/8" | 0.938" | 1.750" | 0.108"-0.160" | 180° | Rockwell R120 | ASME B18.21.1 | White | 10 | 000000000 | 00000 |
| 1" | 1.025" | 1.750" | 0.057"-0.067" | 180° | Not Rated | __ | White | 10 | 000000000 | 00000 |
Metric Water- and Steam-Resistant Plastic Washers
Low moisture absorption and good heat resistance make these washers suitable for wet and harsh environments. All are good electrical insulators.
Delrin® acetal plastic washers combine a slippery, wear-resistant surface with good strength and rigidity.
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 | Color | Pkg. Qty. | Pkg. | |
Delrin® Acetal Plastic | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| M2 | 2.2 | 5.0 | 0.7-0.9 | 180° | Rockwell M90 | White | 10 | 000000000 | 00000 |
| M3 | 3.2 | 8.0 | 0.7-0.9 | 180° | Rockwell M90 | White | 10 | 000000000 | 0000 |
| M4 | 4.3 | 9.0 | 0.7-0.9 | 180° | Rockwell M90 | White | 10 | 000000000 | 0000 |
| M5 | 5.3 | 11.0 | 0.8-1.2 | 180° | Rockwell M90 | White | 10 | 000000000 | 0000 |
| M6 | 6.4 | 12.0 | 1.4-1.8 | 180° | Rockwell M90 | White | 10 | 000000000 | 0000 |
| M7 | 7.4 | 15.0 | 1.4-1.8 | 180° | Rockwell M90 | White | 10 | 000000000 | 0000 |
| M8 | 8.4 | 18.0 | 2.1-2.6 | 180° | Rockwell M90 | White | 10 | 000000000 | 0000 |
| M10 | 10.5 | 22.0 | 2.1-2.6 | 180° | Rockwell M90 | White | 10 | 000000000 | 0000 |
| M12 | 13.1 | 25.0 | 2.1-2.6 | 180° | Rockwell M90 | White | 10 | 000000000 | 0000 |
| M14 | 15.1 | 28.0 | 2.1-2.6 | 180° | Rockwell M90 | White | 10 | 000000000 | 00000 |
| M16 | 17.1 | 29.7 | 2.7-3.3 | 180° | Not Rated | White | 5 | 000000000 | 00000 |
| M18 | 19.1 | 33.7 | 2.7-3.3 | 180° | Not Rated | White | 5 | 000000000 | 00000 |
| M20 | 21.1 | 36.7 | 2.7-3.3 | 180° | Not Rated | White | 5 | 000000000 | 00000 |
Spring Lock Washers for Plastic Screws
Designed for use with plastic screws, these acetal washers are good electrical insulators. They are excellent for use under water and in rotating assemblies. Their slightly cupped shape gives them spring-like flexibility to grip joints tighter than split and tooth lock washers.
For technical drawings and 3-D models, click on a part number.
Temperature Range, °F | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For Screw Size | ID | OD | Thick. | Overall Ht. | Min. | Max. | Hardness | Color | Pkg. Qty. | Pkg. | |
Acetal Plastic | |||||||||||
| No. 6, M3.5 | 0.152" | 0.316" | 0.022"-0.032" | 0.045" | -40° | 212° | Rockwell M80 | White | 100 | 0000000 | 00000 |
| No. 8, M4 | 0.173" | 0.297" | 0.023"-0.033" | 0.046" | -40° | 212° | Rockwell M80 | White | 100 | 0000000 | 0000 |
| No. 10, M5 | 0.204" | 0.365" | 0.025"-0.035" | 0.053" | -40° | 212° | Rockwell M80 | White | 100 | 0000000 | 0000 |
| No. 10, M5 | 0.235" | 0.416" | 0.030"-0.040" | 0.062" | -40° | 212° | Rockwell M80 | White | 100 | 0000000 | 0000 |
| 1/4", M6 | 0.264" | 0.564" | 0.033"-0.043" | 0.066" | -40° | 212° | Rockwell M80 | White | 100 | 0000000 | 0000 |
| 5/16", M8 | 0.328" | 0.660" | 0.043"-0.053" | 0.080" | -40° | 212° | Rockwell M80 | White | 100 | 0000000 | 0000 |
| 3/8", M10 | 0.451" | 0.848" | 0.050"-0.060" | 0.095" | -40° | 212° | Rockwell M80 | White | 25 | 0000000 | 0000 |