Material Material |
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Finish Finish |
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Washer Type Washer Type |
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![]() | Spring Lock |
Thickness Thickness | Show |
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Thickness Thickness | Hide |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Serration Location Serration Location |
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Hardness Hardness |
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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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Keyed Shim Type Keyed Shim Type |
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![]() | With Notch |
Shape Shape |
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![]() | Keyed |
Individual/Set Individual/Set |
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Magnetic Properties Magnetic Properties |
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About Washers
More
Shims for Keyed Shafts
Precisely shaped to fit snugly on keyed shafts, these shims align, level, and space components. Because of their tight fit, they also help components rotate in unison with the shaft.
Shims with a notch need the key inserted. They’re often referred to as arbor spacers.
Stainless steel shims are more corrosion resistant than carbon steel shims. Use them in wet environments where rust is a concern.
For technical drawings and 3-D models, click on a part number.

Notch | |||||||||||
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For Shaft Dia. | ID | ID Tolerance | OD | OD Tolerance | Wd. | Dp. | Minimum Hardness | Magnetic Properties | Pkg. Qty. | Pkg. | |
0.024" Thick. (-0.0025" to 0.0025" Tolerance) | |||||||||||
1" | 1" | 0" to 0.011" | 1 1/2" | -0.002" to 0.002" | 1/4" | 3/32" | Rockwell B80 | May Be Mildly Magnetic | 10 | 000000000 | 000000 |
1 1/4" | 1 1/4" | 0" to 0.011" | 1 3/4" | -0.002" to 0.002" | 5/16" | 1/8" | Rockwell B80 | May Be Mildly Magnetic | 5 | 000000000 | 00000 |
1 1/2" | 1 1/2" | 0" to 0.011" | 2 1/8" | -0.002" to 0.002" | 3/8" | 5/32" | Rockwell B80 | May Be Mildly Magnetic | 5 | 000000000 | 00000 |
2" | 2" | 0" to 0.011" | 2 3/4" | -0.002" to 0.002" | 1/2" | 3/16" | Rockwell B80 | May Be Mildly Magnetic | 1 | 000000000 | 0000 |
Belleville Spring Lock Washers for Socket Head Screws



These washers have smaller outside diameters than standard spring lock washers to fit neatly under socket head cap screws. Also known as conical washers, these have a slightly cupped shape that gives them spring-like flexibility to grip tighter than split and tooth lock washers. They minimize loosening from wear, temperature changes, and vibration. Serrations on the top and bottom provide extra gripping power. Load-rated Belleville disc springs are also available.
18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.

For Screw Size | ID | OD | Thick. | Overall Ht. | Hardness | Pkg. Qty. | Pkg. | |
Steel | ||||||||
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No. 10, M5 | 0.209" | 0.354" | 0.024" | 0.043" | Rockwell C40 | 100 | 000000000 | 00000 |
Zinc-Plated Steel | ||||||||
No. 10, M5 | 0.209" | 0.354" | 0.024" | 0.043" | Rockwell C38 | 100 | 000000000 | 00000 |
1/4", M6 | 0.264" | 0.374" | 0.024" | 0.047" | Rockwell C38 | 50 | 000000000 | 00000 |
18-8 Stainless Steel | ||||||||
No. 10, M5 | 0.209" | 0.354" | 0.024" | 0.043" | Rockwell C38 | 25 | 000000000 | 00000 |

For Screw Size | ID | OD | Thick. | Overall Ht. | Hardness | Pkg. Qty. | Pkg. | |
Steel | ||||||||
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M6 | 0.252" | 0.394" | 0.024" | 0.047" | Rockwell C40 | 100 | 000000000 | 000000 |