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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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Cross Section Shape Cross Section Shape |
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 | Rectangle |
Construction Construction |
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Thickness Thickness | Show |
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Thickness Thickness | Hide |
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For Use With For Use With |
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Material Material |
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Color Color |
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 | Black |
Hardness Hardness |
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Hardness Rating Hardness Rating |
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 | Hard |
Maximum Temperature Maximum Temperature |
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Minimum Temperature Minimum Temperature |
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Top Shape Top Shape |
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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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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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About O-Rings
More
Oil-Resistant Buna-N Backup Rings
Made of Buna-N, these backup rings resist grease, petroleum fluids, and motor oil. Use them to extend the life of your O-rings and improve their performance in high-pressure applications.
For technical drawings and 3-D models, click on a part number.
| For Dash Number | ID | OD | Thick. | Hardness | Temperature Range, °F | Color | Pkg. Qty. | Pkg. | |
0.183" Wide | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 322 | 1.263" | 1.629" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 50 | 00000000 | 00000 |
| 323 | 1.316" | 1.682" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 50 | 00000000 | 0000 |
| 325 | 1.513" | 1.879" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 50 | 00000000 | 0000 |
| 326 | 1.638" | 2.004" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 50 | 00000000 | 0000 |
| 329 | 2.013" | 2.379" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 50 | 00000000 | 00000 |
| 330 | 2.138" | 2.504" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 50 | 00000000 | 00000 |
| 333 | 2.518" | 2.884" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 50 | 00000000 | 00000 |
| 334 | 2.643" | 3.009" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 50 | 00000000 | 00000 |
| 337 | 3.018" | 3.384" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 25 | 00000000 | 0000 |
| 338 | 3.143" | 3.509" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 25 | 00000000 | 00000 |
| 339 | 3.273" | 3.639" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 25 | 00000000 | 00000 |
| 340 | 3.398" | 3.764" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 25 | 00000000 | 00000 |
| 341 | 3.523" | 3.889" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 25 | 0000000 | 00000 |
| 342 | 3.648" | 4.014" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 25 | 00000000 | 00000 |
| 343 | 3.773" | 4.139" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 25 | 00000000 | 00000 |
| 344 | 3.898" | 4.264" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 25 | 00000000 | 00000 |
| 345 | 4.028" | 4.394" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 25 | 00000000 | 00000 |
| 346 | 4.153" | 4.519" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 25 | 00000000 | 00000 |
| 349 | 4.528" | 4.894" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 10 | 00000000 | 0000 |
| 351 | 4.778" | 5.144" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 10 | 0000000 | 0000 |
| 358 | 5.653" | 6.019" | 0.076" | Durometer 90A (Hard) | -40° to 250° | Black | 10 | 00000000 | 0000 |