Material Material | Show |
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System of Measurement System of Measurement |
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ID ID |
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OD OD |
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Thickness Thickness |
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Height Height |
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Disc Spring Type Disc Spring Type |
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 | Belleville |
Working Load Working Load |
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Maximum Temperature Maximum Temperature |
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Flat Load Flat Load |
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Compressed Height @ Working Load Compressed Height@ Working Load |
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Deflection @ Working Load Deflection @ Working Load |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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Minimum Temperature Minimum Temperature |
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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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Washer Type Washer Type |
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 | Split Lock |
Hardness Hardness |
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Specifications Met Specifications Met |
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About Washers
More
Extreme-Temperature Belleville Disc Springs
These springs withstand temperatures from -400° to 1100° F. All are 718 nickel, a high-strength, corrosion-resistant alloy that's also known as Inconel. Use them on shafts, bolts, and the ends of valves to maintain tension and separate components. Unlike Belleville washers, they return to their original height once the load is removed.
Deflection is the distance a spring compresses under load. Flat load is the load at which the spring is completely compressed.
Springs may be stacked to increase working load and deflection. In a nested stack, working load is multiplied by the number of springs used, while deflection remains unchanged. In an inverted stack, deflection is multiplied by the number of springs used, while the working load remains unchanged. In a nested and inverted stack, both load and deflection are increased.
For technical drawings and 3-D models, click on a part number.
| For Shaft Dia. | ID | OD | Thick. | Ht. | Compressed Ht. @ Working Load | Deflection @ Working Load | Working Load, lbs. | Flat Load, lbs. | Material | Temperature Range, °F | Each | |
| 0.138" | 0.142" | 0.281" | 0.02" | 0.032" | 0.028" | 0.004" | 105 | 150 | 718 Nickel | -400° to 1100° | 000000000 | 00000 |
| 0.138" | 0.142" | 0.344" | 0.025" | 0.04" | 0.035" | 0.005" | 161 | 230 | 718 Nickel | -400° to 1100° | 000000000 | 0000 |
| 0.164" | 0.168" | 0.344" | 0.025" | 0.045" | 0.041" | 0.004" | 175 | 250 | 718 Nickel | -400° to 1100° | 000000000 | 0000 |
| 0.164" | 0.168" | 0.406" | 0.03" | 0.045" | 0.039" | 0.006" | 259 | 370 | 718 Nickel | -400° to 1100° | 000000000 | 0000 |
| 0.164" | 0.168" | 0.406" | 0.035" | 0.042" | 0.037" | 0.005" | 280 | 400 | 718 Nickel | -400° to 1100° | 000000000 | 0000 |
| 3/16" | 0.196" | 0.406" | 0.03" | 0.048" | 0.043" | 0.005" | 227 | 325 | 718 Nickel | -400° to 1100° | 000000000 | 0000 |
| 3/16" | 0.196" | 0.469" | 0.04" | 0.056" | 0.05" | 0.006" | 441 | 630 | 718 Nickel | -400° to 1100° | 000000000 | 0000 |
| 1/4" | 0.255" | 0.5" | 0.04" | 0.049" | 0.043" | 0.006" | 331 | 473 | 718 Nickel | -400° to 1100° | 000000000 | 0000 |
| 1/4" | 0.255" | 0.75" | 0.04" | 0.061" | 0.046" | 0.015" | 350 | 500 | 718 Nickel | -400° to 1100° | 000000000 | 0000 |
| 1/4" | 0.258" | 0.688" | 0.05" | 0.085" | 0.074" | 0.011" | 651 | 930 | 718 Nickel | -400° to 1100° | 000000000 | 0000 |
| 5/16" | 0.317" | 0.63" | 0.032" | 0.058" | 0.048" | 0.01" | 255 | 365 | 718 Nickel | -400° to 1100° | 00000000 | 0000 |
| 5/16" | 0.317" | 0.63" | 0.04" | 0.053" | 0.045" | 0.008" | 420 | 600 | 718 Nickel | -400° to 1100° | 000000000 | 0000 |
| 5/16" | 0.322" | 0.688" | 0.05" | 0.063" | 0.054" | 0.009" | 700 | 1,000 | 718 Nickel | -400° to 1100° | 00000000 | 0000 |
| 3/8" | 0.38" | 0.755" | 0.04" | 0.056" | 0.045" | 0.011" | 399 | 570 | 718 Nickel | -400° to 1100° | 00000000 | 0000 |
| 3/8" | 0.38" | 0.755" | 0.061" | 0.073" | 0.065" | 0.008" | 980 | 1,400 | 718 Nickel | -400° to 1100° | 000000000 | 0000 |
| 7/16" | 0.442" | 0.88" | 0.045" | 0.064" | 0.051" | 0.013" | 700 | 1,000 | 718 Nickel | -400° to 1100° | 000000000 | 0000 |
| 1/2" | 0.505" | 1.005" | 0.05" | 0.073" | 0.057" | 0.016" | 560 | 800 | 718 Nickel | -400° to 1100° | 00000000 | 0000 |
| 1/2" | 0.515" | 1.063" | 0.077" | 0.093" | 0.082" | 0.011" | 1,610 | 2,300 | 718 Nickel | -400° to 1100° | 000000000 | 00000 |
| 1/2" | 0.515" | 1.5" | 0.125" | 0.155" | 0.134" | 0.021" | 3,920 | 5,600 | 718 Nickel | -400° to 1100° | 000000000 | 00000 |
| 9/16" | 0.562" | 1.13" | 0.04" | 0.063" | 0.047" | 0.016" | 196 | 280 | 718 Nickel | -400° to 1100° | 000000000 | 0000 |
| 5/8" | 0.625" | 1.255" | 0.04" | 0.074" | 0.05" | 0.024" | 210 | 300 | 718 Nickel | -400° to 1100° | 00000000 | 0000 |
| 5/8" | 0.625" | 1.255" | 0.05" | 0.08" | 0.059" | 0.021" | 420 | 600 | 718 Nickel | -400° to 1100° | 00000000 | 0000 |
| 5/8" | 0.637" | 1.25" | 0.061" | 0.09" | 0.07" | 0.02" | 840 | 1,200 | 718 Nickel | -400° to 1100° | 000000000 | 00000 |
| 5/8" | 0.644" | 1.313" | 0.1" | 0.122" | 0.107" | 0.015" | 2,730 | 3,900 | 718 Nickel | -400° to 1100° | 000000000 | 00000 |
| 3/4" | 0.773" | 1.5" | 0.125" | 0.147" | 0.132" | 0.015" | 4,340 | 6,200 | 718 Nickel | -400° to 1100° | 00000000 | 00000 |
| 3/4" | 0.773" | 2" | 0.155" | 0.198" | 0.169" | 0.029" | 6,790 | 9,700 | 718 Nickel | -400° to 1100° | 000000000 | 00000 |
| 7/8" | 0.901" | 1.75" | 0.125" | 0.155" | 0.134" | 0.021" | 4,200 | 6,000 | 718 Nickel | -400° to 1100° | 000000000 | 00000 |
| 7/8" | 0.995" | 2.005" | 0.084" | 0.136" | 0.103" | 0.033" | 1,610 | 2,300 | 718 Nickel | -400° to 1100° | 00000000 | 00000 |
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.
K500 nickel washers (also known as Monel) have excellent resistance to salt water and some acids. They may be mildly magnetic.
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. | |
K500 Nickel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/4" | 0.260" | 0.487" | 0.062"-0.077" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 000000 |
| 5/16" | 0.322" | 0.583" | 0.078"-0.097" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 00000 |
| 3/8" | 0.385" | 0.680" | 0.094"-0.115" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 00000 |
| 1/2" | 0.512" | 0.869" | 0.125"-0.151" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
| 5/8" | 0.641" | 1.073" | 0.156"-0.189" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 00000 |