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About Washers
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General Purpose Washers
400 nickel washers have excellent resistance to salt water and some acids. They 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. | |
400 Nickel | |||||||
|---|---|---|---|---|---|---|---|
| 1/4" | 0.265" | 0.688" | 0.047"-0.052" | Rockwell C45 | 10 | 000000000 | 000000 |
| 5/16" | 0.344" | 0.750" | 0.047"-0.052" | Rockwell C45 | 5 | 000000000 | 0000 |
| 3/8" | 0.390" | 1.000" | 0.054"-0.068" | Rockwell C45 | 5 | 000000000 | 00000 |
| 1/2" | 0.562" | 1.250" | 0.071"-0.084" | Rockwell C45 | 1 | 000000000 | 0000 |
| 5/8" | 0.688" | 1.500" | 0.071"-0.084" | Rockwell C45 | 1 | 000000000 | 0000 |
| 3/4" | 0.812" | 1.750" | 0.085"-0.102" | Rockwell C45 | 1 | 000000000 | 00000 |
Mil. Spec. Washers
Choose these washers for their adherence to strict military standards for material and construction.
Nickel copper washers (also known as Monel) are more corrosion resistant than stainless steel. They have excellent resistance to salt water and some acids.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Nickel Copper | ||||||||
|---|---|---|---|---|---|---|---|---|
MS15795 | ||||||||
| No. 1 | 0.078" | 0.188" | 0.016"-0.025" | Rockwell B89 | MS15795-401 | 25 | 000000000 | 00000 |
| No. 2 | 0.094" | 0.250" | 0.016"-0.025" | Rockwell B89 | MS15795-402 | 25 | 000000000 | 0000 |
| No. 4 | 0.125" | 0.250" | 0.017"-0.028" | Rockwell B89 | MS15795-403 | 25 | 000000000 | 0000 |
| No. 4 | 0.125" | 0.312" | 0.025"-0.040" | Rockwell B89 | MS15795-404 | 25 | 000000000 | 00000 |
| No. 6 | 0.156" | 0.312" | 0.027"-0.048" | Rockwell B89 | MS15795-405 | 25 | 000000000 | 00000 |
| No. 6 | 0.156" | 0.375" | 0.036"-0.065" | Rockwell B89 | MS15795-406 | 10 | 000000000 | 0000 |
| No. 8 | 0.188" | 0.375" | 0.036"-0.065" | Rockwell B89 | MS15795-407 | 10 | 000000000 | 0000 |
| No. 8 | 0.188" | 0.438" | 0.036"-0.065" | Rockwell B89 | MS15795-441 | 10 | 000000000 | 0000 |
| No. 10 | 0.219" | 0.438" | 0.036"-0.065" | Rockwell B89 | MS15795-408 | 10 | 000000000 | 0000 |
| No. 10 | 0.219" | 0.500" | 0.036"-0.065" | Rockwell B89 | MS15795-442 | 10 | 000000000 | 00000 |
| No. 12 | 0.250" | 0.562" | 0.051"-0.080" | Rockwell B89 | MS15795-409 | 5 | 000000000 | 00000 |
| 1/4" | 0.281" | 0.625" | 0.051"-0.080" | Rockwell B89 | MS15795-410 | 5 | 000000000 | 00000 |
| 1/4" | 0.281" | 0.734" | 0.056"-0.071" | Rockwell B89 | MS15795-445 | 5 | 000000000 | 00000 |
| 1/4" | 0.312" | 0.734" | 0.051"-0.080" | Rockwell B89 | MS15795-411 | 5 | 000000000 | 00000 |
| 5/16" | 0.344" | 0.688" | 0.051"-0.080" | Rockwell B89 | MS15795-412 | 5 | 000000000 | 00000 |
| 5/16" | 0.375" | 0.875" | 0.064"-0.104" | Rockwell B89 | MS15795-413 | 1 | 000000000 | 0000 |
| 3/8" | 0.406" | 0.625" | 0.051"-0.080" | Rockwell B89 | MS15795-448 | 5 | 000000000 | 00000 |
| 3/8" | 0.406" | 0.812" | 0.051"-0.080" | Rockwell B89 | MS15795-414 | 1 | 000000000 | 0000 |
| 3/8" | 0.438" | 1.000" | 0.064"-0.104" | Rockwell B89 | MS15795-415 | 1 | 000000000 | 0000 |
| 7/16" | 0.469" | 0.922" | 0.051"-0.080" | Rockwell B89 | MS15795-416 | 1 | 000000000 | 0000 |
| 7/16" | 0.500" | 0.875" | 0.058"-0.070" | Rockwell B89 | MS15795-449 | 1 | 000000000 | 0000 |
| 7/16" | 0.500" | 1.250" | 0.064"-0.104" | Rockwell B89 | MS15795-417 | 1 | 000000000 | 00000 |
| 1/2" | 0.531" | 1.062" | 0.074"-0.121" | Rockwell B89 | MS15795-418 | 1 | 000000000 | 0000 |
| 1/2" | 0.562" | 1.375" | 0.086"-0.132" | Rockwell B89 | MS15795-419 | 1 | 000000000 | 00000 |
| 5/8" | 0.656" | 1.312" | 0.074"-0.121" | Rockwell B89 | MS15795-420 | 1 | 000000000 | 00000 |
| 5/8" | 0.688" | 1.750" | 0.108"-0.160" | Rockwell B89 | MS15795-421 | 1 | 000000000 | 00000 |
| 3/4" | 0.812" | 1.469" | 0.108"-0.160" | Rockwell B89 | MS15795-422 | 1 | 000000000 | 00000 |
| 7/8" | 0.938" | 1.750" | 0.108"-0.160" | Rockwell B89 | MS15795-424 | 1 | 000000000 | 00000 |
| 1" | 1.062" | 2.000" | 0.108"-0.160" | Rockwell B89 | MS15795-426 | 1 | 000000000 | 00000 |
Split Lock Washers
As a screw is tightened, these washers flatten to add tension to the joint and prevent loosening from small amounts of vibration.
K500 nickel washers (also known as Monel) have excellent resistance to salt water and some acids. They may be mildly magnetic.
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. | |
K500 Nickel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/4" | 0.260" | 0.487" | 0.062"-0.077" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 00000 |
| 5/16" | 0.322" | 0.583" | 0.078"-0.097" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 0000 |
| 3/8" | 0.385" | 0.680" | 0.094"-0.115" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 00000 |
| 1/2" | 0.512" | 0.869" | 0.125"-0.151" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| 5/8" | 0.641" | 1.073" | 0.156"-0.189" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |