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Metric Oversized Washers
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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.
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 | |||||||
---|---|---|---|---|---|---|---|
M6 | 7.0 | 12.0 | 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 | 20.0 | 3.0-4.5 | Rockwell C38 | 25 | 000000000 | 00000 |
M12 | 14.2 | 26.0 | 3.4-3.7 | Rockwell C38 | 10 | 000000000 | 0000 |
M16 | 18.0 | 32.0 | 3.1-4.6 | Rockwell C38 | 5 | 000000000 | 0000 |
M20 | 22.0 | 38.0 | 2.9-3.3 | Rockwell C38 | 5 | 000000000 | 0000 |
M24 | 26.0 | 48.0 | 3.4-4.6 | Rockwell C38 | 5 | 000000000 | 00000 |
M30 | 33.0 | 58.0 | 3.4-4.6 | Rockwell C38 | 1 | 000000000 | 0000 |
M36 | 39.3 | 70.0 | 3.9-4.3 | Rockwell C38 | 1 | 000000000 | 00000 |
Metric General Purpose Washers
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Use these metric washers to evenly distribute the load under bolt or screw heads and nuts when fastening. They can also act as spacers.
Stainless steel washers are more corrosion resistant than steel washers, and almost as strong. Stronger and slightly more corrosion resistant than 316 stainless steel, Bumax 109 stainless steel washers are best for marine environments and chemical-processing plants.
Washers that meet ISO 7089, 7090, 7091, and 7092 (formerly DIN 125, 126, and 433), meet international standards for fastener dimensions. The ISO 7091 washers have a slightly rougher surface than a typical flat washer.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID, mm | OD, mm | Thickness, mm | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Bumax 109 Stainless Steel | ||||||||
---|---|---|---|---|---|---|---|---|
M6 | 6.4 | 12.0 | 1.4-1.8 | Rockwell C30 | DIN 125; ISO 7089 | 10 | 000000000 | 00000 |
M8 | 8.4 | 16.0 | 1.4-1.8 | Rockwell C30 | DIN 125; ISO 7089 | 10 | 000000000 | 0000 |
M10 | 10.5 | 20.0 | 1.8-2.2 | Rockwell C30 | DIN 125; ISO 7089 | 5 | 000000000 | 0000 |
M12 | 13.0 | 24.0 | 2.3-2.7 | Rockwell C30 | DIN 125; ISO 7089 | 5 | 000000000 | 00000 |
Metric Split Lock Washers
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![](/prerenderstable/mvPRE/contents/gfx/imagecache/sta/standardwashers1577115954-p9@halfx_637126922014114813.png?ver=imagenotfound)
As a screw is tightened, these metric washers flatten to add tension to the joint, counteracting fatigue around the joint from small amounts of vibration. This makes them a common choice to prevent fasteners from loosening. However, they resist the least amount of vibration compared to other locking washers. They meet a DIN or ASME standard for split lock washer dimensions.
Standard split lock washers have a left-hand helix that have right-hand threads to prevent loosening. They have uneven split ends that bite into fasteners for a tight grip but won’t work with hardened surfaces. They hold better than curved or wave washers. These washers are not reusable after tightening.
Steel washers are stronger and resist wear better than zinc-plated steel and stainless steel washers. Use them in dry 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 | ||||||||
---|---|---|---|---|---|---|---|---|
Standard | ||||||||
M6 | 6.2 | 12.1 | 2.0 | Rockwell C38 | ASME B18.21.2M | 100 | 000000000 | 000000 |
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 |