System of Measurement System of Measurement |
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Material Material |
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Finish Finish |
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OD OD |
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ID ID |
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Washer Type Washer Type |
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![]() | Split Lock |
Thickness Thickness |
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Specifications Met Specifications Met |
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Hardness Hardness |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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About Washers
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Metric Split Lock Washers for Socket Head Screws

Also known as high-collar lock washers, these have smaller outside diameters than standard split lock washers to fit neatly under socket head cap screws. As a screw is tightened, they flatten to add tension to the joint and prevent loosening from small amounts of vibration.
Zinc-plated steel washers are corrosion resistant in wet environments.
18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.
316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.
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. | |
Steel with Zinc-Plated Finish | ||||||||
---|---|---|---|---|---|---|---|---|
M3 | 3.4 | 5.6 | 0.9-1.1 | Rockwell C44 | DIN 7980 | 100 | 000000000 | 00000 |
M4 | 4.4 | 7.0 | 1.1-1.3 | Rockwell C44 | DIN 7980 | 100 | 000000000 | 0000 |
M5 | 5.4 | 8.8 | 1.5-1.7 | Rockwell C44 | DIN 7980 | 100 | 000000000 | 0000 |
M6 | 6.5 | 9.9 | 1.5-1.7 | Rockwell C44 | DIN 7980 | 100 | 000000000 | 0000 |
M8 | 8.5 | 12.7 | 1.9-2.1 | Rockwell C44 | DIN 7980 | 100 | 000000000 | 0000 |
M10 | 10.7 | 16.0 | 2.3-2.7 | Rockwell C44 | DIN 7980 | 100 | 000000000 | 00000 |
M12 | 12.7 | 18.0 | 2.3-2.7 | Rockwell C44 | DIN 7980 | 100 | 000000000 | 00000 |
M14 | 14.7 | 21.1 | 2.8-3.2 | Rockwell C44 | DIN 7980 | 50 | 000000000 | 00000 |
M16 | 17.0 | 24.4 | 3.3-3.7 | Rockwell C44 | DIN 7980 | 25 | 000000000 | 0000 |
M18 | 19.0 | 26.4 | 3.3-3.7 | Rockwell C44 | DIN 7980 | 25 | 000000000 | 00000 |
M20 | 21.2 | 30.6 | 4.3-4.7 | Rockwell C44 | DIN 7980 | 10 | 000000000 | 0000 |
M24 | 25.5 | 35.9 | 4.8-5.2 | Rockwell C44 | DIN 7980 | 10 | 000000000 | 0000 |
M27 | 28.5 | 38.9 | 4.8-5.2 | Rockwell C44 | DIN 7980 | 5 | 000000000 | 0000 |
M30 | 31.7 | 44.1 | 5.8-6.2 | Rockwell C44 | DIN 7980 | 5 | 000000000 | 00000 |
M36 | 37.7 | 52.2 | 6.7-7.3 | Rockwell C44 | DIN 7980 | 1 | 000000000 | 0000 |
Steel with Black Finish | ||||||||
M3 | 3.4 | 5.6 | 0.9-1.1 | Rockwell C44 | DIN 7980 | 100 | 000000000 | 0000 |
M3.5 | 3.9 | 6.1 | 0.9-1.1 | Rockwell C44 | DIN 7980 | 100 | 000000000 | 0000 |
M4 | 4.4 | 7.0 | 1.1-1.3 | Rockwell C44 | DIN 7980 | 100 | 000000000 | 0000 |
M5 | 5.4 | 8.8 | 1.5-1.7 | Rockwell C44 | DIN 7980 | 100 | 000000000 | 0000 |
M6 | 6.5 | 9.9 | 1.5-1.7 | Rockwell C44 | DIN 7980 | 100 | 000000000 | 0000 |
M8 | 8.5 | 12.7 | 1.9-2.1 | Rockwell C44 | DIN 7980 | 100 | 000000000 | 0000 |
M10 | 10.7 | 16.0 | 2.3-2.7 | Rockwell C44 | DIN 7980 | 100 | 000000000 | 00000 |
M12 | 12.7 | 18.0 | 2.3-2.7 | Rockwell C44 | DIN 7980 | 100 | 000000000 | 00000 |
M14 | 14.7 | 21.1 | 2.8-3.2 | Rockwell C44 | DIN 7980 | 100 | 000000000 | 00000 |
M16 | 17.0 | 24.4 | 3.3-3.7 | Rockwell C44 | DIN 7980 | 50 | 000000000 | 00000 |
M18 | 19.0 | 26.4 | 3.3-3.7 | Rockwell C44 | DIN 7980 | 25 | 000000000 | 0000 |
M20 | 21.2 | 30.6 | 4.3-4.7 | Rockwell C44 | DIN 7980 | 25 | 000000000 | 00000 |
M22 | 23.5 | 32.9 | 4.3-4.7 | Rockwell C44 | DIN 7980 | 10 | 000000000 | 0000 |
M24 | 25.5 | 35.9 | 4.8-5.2 | Rockwell C44 | DIN 7980 | 10 | 000000000 | 0000 |
M27 | 28.5 | 38.9 | 4.8-5.2 | Rockwell C44 | DIN 7980 | 5 | 000000000 | 0000 |
M30 | 31.7 | 44.1 | 5.8-6.2 | Rockwell C44 | DIN 7980 | 5 | 000000000 | 0000 |
M36 | 37.7 | 52.2 | 6.7-7.3 | Rockwell C44 | DIN 7980 | 1 | 000000000 | 0000 |
M42 | 43.7 | 60.2 | 7.7-8.3 | Rockwell C44 | DIN 7980 | 1 | 000000000 | 00000 |
M48 | 50.5 | 67.0 | 7.7-8.3 | Rockwell C44 | DIN 7980 | 1 | 000000000 | 00000 |
18-8 Stainless Steel | ||||||||
M3 | 3.4 | 5.6 | 0.9-1.1 | Not Rated | DIN 7980 | 100 | 000000000 | 0000 |
M3.5 | 3.9 | 6.1 | 0.9-1.1 | Not Rated | DIN 7980 | 100 | 000000000 | 0000 |
M4 | 4.4 | 7.0 | 1.1-1.3 | Not Rated | DIN 7980 | 100 | 000000000 | 0000 |
M5 | 5.4 | 8.8 | 1.5-1.7 | Not Rated | DIN 7980 | 100 | 000000000 | 0000 |
M6 | 6.5 | 9.9 | 1.5-1.7 | Not Rated | DIN 7980 | 100 | 000000000 | 0000 |
M8 | 8.5 | 12.7 | 1.9-2.1 | Not Rated | DIN 7980 | 100 | 000000000 | 0000 |
M10 | 10.7 | 16.0 | 2.3-2.7 | Not Rated | DIN 7980 | 100 | 000000000 | 00000 |
M12 | 12.7 | 18.0 | 2.3-2.7 | Not Rated | DIN 7980 | 50 | 000000000 | 0000 |
M14 | 14.7 | 21.1 | 2.8-3.2 | Not Rated | DIN 7980 | 10 | 000000000 | 0000 |
M16 | 17.0 | 24.4 | 3.3-3.7 | Not Rated | DIN 7980 | 10 | 000000000 | 0000 |
M18 | 19.0 | 26.4 | 3.3-3.7 | Not Rated | DIN 7980 | 10 | 000000000 | 0000 |
M20 | 21.2 | 30.6 | 4.3-4.7 | Not Rated | DIN 7980 | 10 | 000000000 | 00000 |
M22 | 23.5 | 32.9 | 4.3-4.7 | Not Rated | DIN 7980 | 5 | 000000000 | 00000 |
M24 | 25.5 | 35.9 | 4.8-5.2 | Not Rated | DIN 7980 | 5 | 000000000 | 0000 |
M27 | 28.5 | 38.9 | 4.8-5.2 | Not Rated | DIN 7980 | 5 | 000000000 | 00000 |
M30 | 31.7 | 44.1 | 5.8-6.2 | Not Rated | DIN 7980 | 1 | 000000000 | 00000 |
316 Stainless Steel | ||||||||
M3 | 3.4 | 5.6 | 0.9-1.1 | Not Rated | DIN 7980 | 100 | 000000000 | 0000 |
M4 | 4.4 | 7.0 | 1.1-1.3 | Not Rated | DIN 7980 | 100 | 000000000 | 0000 |
M5 | 5.4 | 8.8 | 1.5-1.7 | Not Rated | DIN 7980 | 100 | 000000000 | 0000 |
M6 | 6.5 | 9.9 | 1.5-1.7 | Not Rated | DIN 7980 | 100 | 000000000 | 0000 |
M8 | 8.5 | 12.7 | 1.9-2.1 | Not Rated | DIN 7980 | 50 | 000000000 | 0000 |
M10 | 10.7 | 16.0 | 2.3-2.7 | Not Rated | DIN 7980 | 50 | 000000000 | 00000 |
M12 | 12.7 | 18.0 | 2.3-2.7 | Not Rated | DIN 7980 | 25 | 000000000 | 00000 |
M14 | 14.7 | 21.1 | 2.8-3.2 | Not Rated | DIN 7980 | 10 | 000000000 | 0000 |
M16 | 17.0 | 24.4 | 3.3-3.7 | Not Rated | DIN 7980 | 10 | 000000000 | 0000 |
M18 | 19.0 | 26.4 | 3.3-3.7 | Not Rated | DIN 7980 | 10 | 000000000 | 0000 |
M20 | 21.2 | 30.6 | 4.3-4.7 | Not Rated | DIN 7980 | 1 | 000000000 | 0000 |
M22 | 23.5 | 32.9 | 4.3-4.7 | Not Rated | DIN 7980 | 1 | 000000000 | 0000 |
M24 | 25.5 | 35.9 | 4.8-5.2 | Not Rated | DIN 7980 | 1 | 000000000 | 0000 |
M30 | 31.7 | 44.1 | 5.8-6.2 | Not Rated | DIN 7980 | 1 | 000000000 | 00000 |