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Finish Finish |
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System of Measurement System of Measurement |
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For Screw Size For Screw Size |
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Washer Type Washer Type |
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 | Split Lock |
ID ID |
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OD OD |
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Thickness Thickness |
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Specifications Met Specifications Met |
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Hardness Hardness |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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About Washers
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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.
Zinc-aluminum-coated steel washers are 40 times as corrosion resistant as zinc-plated washers and comparable to Magni-coated washers.
Aluminum washers are lightweight and corrosion resistant in wet environments.
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. | |
Zinc-Aluminum Coated Carbon Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/4" | 0.260" | 0.487" | 0.062" | Rockwell C38 | ASME B18.21.1 | 25 | 00000000 | 00000 |
| 5/16" | 0.322" | 0.583" | 0.078" | Rockwell C38 | ASME B18.21.1 | 25 | 00000000 | 0000 |
| 3/8" | 0.385" | 0.680" | 0.094" | Rockwell C38 | ASME B18.21.1 | 10 | 00000000 | 0000 |
| 7/16" | 0.450" | 0.776" | 0.109" | Rockwell C38 | ASME B18.21.1 | 10 | 00000000 | 0000 |
| 1/2" | 0.512" | 0.869" | 0.125" | Rockwell C38 | ASME B18.21.1 | 10 | 00000000 | 0000 |
| 9/16" | 0.574" | 0.965" | 0.141" | Rockwell C38 | ASME B18.21.1 | 5 | 00000000 | 0000 |
| 5/8" | 0.641" | 1.073" | 0.156" | Rockwell C38 | ASME B18.21.1 | 5 | 00000000 | 0000 |
| 3/4" | 0.766" | 1.265" | 0.188" | Rockwell C38 | ASME B18.21.1 | 1 | 00000000 | 0000 |
| 7/8" | 0.894" | 1.459" | 0.219" | Rockwell C38 | ASME B18.21.1 | 1 | 00000000 | 0000 |
| 1" | 1.024" | 1.656" | 0.250" | Rockwell C38 | ASME B18.21.1 | 1 | 00000000 | 0000 |
| 1 1/8" | 1.153" | 1.847" | 0.281" | Rockwell C38 | ASME B18.21.1 | 1 | 00000000 | 0000 |
| 1 1/4" | 1.280" | 2.036" | 0.312" | Rockwell C38 | ASME B18.21.1 | 1 | 00000000 | 00000 |
| 1 3/8" | 1.408" | 2.219" | 0.344" | Rockwell C38 | ASME B18.21.1 | 1 | 00000000 | 00000 |
| 1 1/2" | 1.534" | 2.419" | 0.375" | Rockwell C38 | ASME B18.21.1 | 1 | 00000000 | 00000 |
| 1 3/4" | 1.789" | 2.679" | 0.389" | Rockwell C38 | ASME B18.21.1 | 1 | 00000000 | 00000 |
| 2" | 2.039" | 2.936" | 0.422" | Rockwell C38 | ASME B18.21.1 | 1 | 00000000 | 00000 |
Aluminum | ||||||||
| No. 6 | 0.148" | 0.250" | 0.031" | Rockwell B87 | ASME B18.21.1 | 100 | 000000000 | 0000 |
| No. 8 | 0.174" | 0.293" | 0.040" | Rockwell B87 | ASME B18.21.1 | 100 | 000000000 | 0000 |
| No. 10 | 0.200" | 0.334" | 0.047" | Rockwell B87 | ASME B18.21.1 | 100 | 000000000 | 0000 |
| 1/4" | 0.260" | 0.487" | 0.062" | Rockwell B87 | ASME B18.21.1 | 100 | 000000000 | 00000 |
| 5/16" | 0.322" | 0.583" | 0.078" | Rockwell B87 | ASME B18.21.1 | 50 | 000000000 | 0000 |
| 3/8" | 0.385" | 0.680" | 0.094" | Rockwell B87 | ASME B18.21.1 | 50 | 000000000 | 00000 |
| 1/2" | 0.512" | 0.869" | 0.125" | Rockwell B87 | ASME B18.21.1 | 10 | 000000000 | 0000 |
| 5/8" | 0.641" | 1.073" | 0.156" | Rockwell B87 | ASME B18.21.1 | 10 | 000000000 | 00000 |
| 3/4" | 0.766" | 1.265" | 0.188" | Rockwell B87 | ASME B18.21.1 | 10 | 000000000 | 00000 |