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Material Material | Show |
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System of Measurement System of Measurement |
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Washer Type Washer Type |
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![]() | Split Lock |
Hardness Hardness |
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Specifications Met Specifications Met |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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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.
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. | |
Aluminum | ||||||||
---|---|---|---|---|---|---|---|---|
No. 6 | 0.148" | 0.250" | 0.031" | Rockwell B87 | ASME B18.21.1 | 100 | 000000000 | 00000 |
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 | 0000 |
3/4" | 0.766" | 1.265" | 0.188" | Rockwell B87 | ASME B18.21.1 | 10 | 000000000 | 00000 |