System of Measurement System of Measurement |
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Material Material |
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Finish Finish | Show |
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Washer Type Washer Type |
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Flat | Split Lock |
OD OD |
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ID ID |
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Thickness Thickness |
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Hardness Rating Hardness Rating |
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Split Lock Washer Type Split Lock Washer Type |
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![]() | Standard |
Specifications Met Specifications Met |
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Compared to our general purpose washers, these have exaggerated diameters and/or thicknesses. Use them to cover oversized holes, hold heavy fastening loads, or as spacers and levelers.
These washers meet various DIN and ISO specifications, which are international standards for washer dimensions. ISO 8738 is formerly DIN 1440.ISO 7093 is formerly DIN 9021.
Blue-dyed steel washers have a unique color so you can tell they're metric at a glance.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID, mm | OD, mm | Thick., mm | Hardness | Pkg. Qty. | Pkg. | |
Blue-Dyed Steel | |||||||
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M6 | 7.0 | 13.6 | 2.7-4.0 | Rockwell C38 | 25 | 000000000 | 000000 |
M8 | 9.0 | 17.0 | 2.5-3.5 | Rockwell C38 | 50 | 000000000 | 00000 |
M10 | 11.0 | 21.5 | 3.0-4.5 | Rockwell C38 | 25 | 000000000 | 00000 |
M12 | 14.0 | 27.0 | 3.1-4.8 | Rockwell C38 | 10 | 000000000 | 0000 |
M16 | 18.0 | 34.0 | 3.1-4.6 | Rockwell C38 | 5 | 000000000 | 0000 |
M20 | 22.0 | 42.0 | 3.1-4.6 | Rockwell C38 | 5 | 000000000 | 0000 |
M24 | 26.0 | 50.0 | 3.4-4.6 | Rockwell C38 | 5 | 000000000 | 00000 |
M30 | 33.0 | 60.0 | 3.4-4.6 | Rockwell C38 | 1 | 000000000 | 0000 |
M36 | 39.0 | 72.0 | 3.4-4.6 | Rockwell C38 | 1 | 000000000 | 0000 |
As you tighten a bolt, these metric washers flatten to add tension to the threaded joint and prevent loosening from small amounts of vibration. All of these washers meet a DIN or ASME standard for split lock washer dimensions.
Standard split lock washers have a left-hand helix, which means you can only use them with bolts that have right-hand threads to prevent clockwise rotation from vibration. When tightened, their uneven split ends bite into unhardened nuts and bolts for a tighter hold than curved or wave washers, but only for applications with clockwise rotation. The washers, nuts, and bolts will be deformed when untightened, so none of them can be reused. Do not use these washers on hardened surfaces.
Steel washers are stronger and more wear resistant than zinc-plated steel and stainless steel. Use them in dry environments because they will rust in wet and corrosive environments. Blue-dyed steel washers are easy to spot.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID, mm | OD, mm | Thick., mm | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Blue-Dyed Steel | ||||||||
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Standard | ||||||||
M6 | 6.2 | 12.1 | 2.0 | Rockwell C38 | ASME B18.21.2M | 100 | 000000000 | 00000 |
M8 | 8.2 | 15.2 | 2.5 | Rockwell C38 | ASME B18.21.2M | 100 | 000000000 | 0000 |
M10 | 10.2 | 18.0 | 2.9 | Rockwell C38 | ASME B18.21.2M | 50 | 000000000 | 0000 |
M12 | 12.3 | 21.7 | 3.8 | Rockwell C38 | ASME B18.21.2M | 100 | 000000000 | 00000 |
M16 | 16.4 | 27.9 | 4.8 | Rockwell C38 | ASME B18.21.2M | 25 | 000000000 | 00000 |
M20 | 20.5 | 33.8 | 5.7 | Rockwell C38 | ASME B18.21.2M | 10 | 000000000 | 0000 |
M24 | 24.5 | 40.7 | 7.2 | Rockwell C38 | ASME B18.21.2M | 10 | 000000000 | 00000 |