OneMonroe’s Metric Buna O-Rings are engineered to provide reliable sealing performance across a variety of industrial and commercial applications. Made from high-quality Buna-N (Nitrile) rubber, these O-rings are known for their excellent resistance to oils, fuels, and other petroleum-based products, making them ideal for use in environments where durable, leak-proof seals are essential. Buna-N’s resilient properties allow it to maintain its integrity even in challenging temperatures, ranging from -40°F to 250°F, ensuring these O-rings can withstand both low and high-stress conditions with ease. With a broad range of metric sizes available, OneMonroe ensures you’ll find the right fit for your exact specifications.
Our Metric Buna O-Rings are crafted to offer outstanding resistance to abrasion and tearing, providing long-lasting performance in rigorous applications. This makes them well-suited for automotive, aerospace, marine, and hydraulic systems, as well as in general maintenance and repair settings. The unique chemical composition of Buna-N allows these O-rings to endure pressure and friction over extended periods without compromising their sealing capabilities, making them a reliable choice for static and dynamic sealing tasks. Each O-ring is manufactured to precise industry standards, ensuring a dependable fit and function in every installation.
With OneMonroe, you’re getting more than just a product; you’re receiving a commitment to quality and expertise. Our team is dedicated to supporting your projects with high-quality metric Buna O-Rings that meet both industry standards and specific customer requirements. We provide technical support to help you select the best O-ring for your application, offering detailed product specifications and guidance. Trust OneMonroe to deliver durable, efficient, and cost-effective sealing solutions tailored to meet the demands of your unique projects.
For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.
Item # |
IntegrationID |
Type |
Material |
Cross Reference |
Cross Section Width |
Durometer |
Inside Diameter |
Product Guides |
|---|---|---|---|---|---|---|---|---|
| 266 X 6 B-90 |
IntegrationID
N/A 124430 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 90 | Inside Diameter N/A 266.00 mm | Product Guides N/A Seal Guides |
| 270x6.00B70 |
IntegrationID
N/A 124431 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 70 | Inside Diameter N/A 270.00 mm | Product Guides N/A Seal Guides |
| 270 X 6 B-90 |
IntegrationID
N/A 124432 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 90 | Inside Diameter N/A 270.00 mm | Product Guides N/A Seal Guides |
| 272 X 6 B-70 |
IntegrationID
N/A 124433 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A V275 | Cross Section Width N/A 6.00 mm | Durometer N/A 70 | Inside Diameter N/A 272.00 mm | Product Guides N/A Seal Guides |
| 272 X 6 B-90 |
IntegrationID
N/A 124434 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A V275 | Cross Section Width N/A 6.00 mm | Durometer N/A 90 | Inside Diameter N/A 272.00 mm | Product Guides N/A Seal Guides |
| 278 X 6 B-70 |
IntegrationID
N/A 124437 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 70 | Inside Diameter N/A 278.00 mm | Product Guides N/A Seal Guides |
| 278 X 6 B-90 |
IntegrationID
N/A 124438 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 90 | Inside Diameter N/A 278.00 mm | Product Guides N/A Seal Guides |
| 280x6.00B70 |
IntegrationID
N/A 124439 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 70 | Inside Diameter N/A 280.00 mm | Product Guides N/A Seal Guides |
| 280 X 6 B-90 |
IntegrationID
N/A 124440 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 90 | Inside Diameter N/A 280.00 mm | Product Guides N/A Seal Guides |
| 284 X 6 B-70 |
IntegrationID
N/A 124441 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 70 | Inside Diameter N/A 284.00 mm | Product Guides N/A Seal Guides |
| 284 X 6 B-90 |
IntegrationID
N/A 124442 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 90 | Inside Diameter N/A 284.00 mm | Product Guides N/A Seal Guides |
| 285x6.00B70 |
IntegrationID
N/A 124443 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 70 | Inside Diameter N/A 285.00 mm | Product Guides N/A Seal Guides |
| 285 X 6 B-90 |
IntegrationID
N/A 124444 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 90 | Inside Diameter N/A 285.00 mm | Product Guides N/A Seal Guides |
| 288 X 6 B-70 |
IntegrationID
N/A 124445 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 70 | Inside Diameter N/A 288.00 mm | Product Guides N/A Seal Guides |
| 288 X 6 B-90 |
IntegrationID
N/A 124446 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 90 | Inside Diameter N/A 288.00 mm | Product Guides N/A Seal Guides |
| 290 X 6 B-70 |
IntegrationID
N/A 124447 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 70 | Inside Diameter N/A 290.00 mm | Product Guides N/A Seal Guides |
| 290 X 6 B-90 |
IntegrationID
N/A 124448 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 90 | Inside Diameter N/A 290.00 mm | Product Guides N/A Seal Guides |
| 294x6.00B70 |
IntegrationID
N/A 124449 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 70 | Inside Diameter N/A 294.00 mm | Product Guides N/A Seal Guides |
| 294 X 6 B-90 |
IntegrationID
N/A 124450 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 90 | Inside Diameter N/A 294.00 mm | Product Guides N/A Seal Guides |
| 295x6.00B70 |
IntegrationID
N/A 124451 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 70 | Inside Diameter N/A 295.00 mm | Product Guides N/A Seal Guides |
| 295 X 6 B-90 |
IntegrationID
N/A 124452 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 90 | Inside Diameter N/A 295.00 mm | Product Guides N/A Seal Guides |
| 300x6.00B70 |
IntegrationID
N/A 124453 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 70 | Inside Diameter N/A 300.00 mm | Product Guides N/A Seal Guides |
| 300 X 6 B-90 |
IntegrationID
N/A 124454 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 90 | Inside Diameter N/A 300.00 mm | Product Guides N/A Seal Guides |
| 301 X 6 B-70 |
IntegrationID
N/A 124455 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 70 | Inside Diameter N/A 301.00 mm | Product Guides N/A Seal Guides |
| 301 X 6 B-90 |
IntegrationID
N/A 124456 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 6.00 mm | Durometer N/A 90 | Inside Diameter N/A 301.00 mm | Product Guides N/A Seal Guides |

