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 |
|---|---|---|---|---|---|---|---|---|
| 340 X 6 B-90 |
IntegrationID
N/A 124484 |
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 340.00 mm | Product Guides N/A Seal Guides |
| 345 X 6 B-70 |
IntegrationID
N/A 124485 |
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 345.00 mm | Product Guides N/A Seal Guides |
| 345 X 6 B-90 |
IntegrationID
N/A 124486 |
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 345.00 mm | Product Guides N/A Seal Guides |
| 347 X 6 B-70 |
IntegrationID
N/A 124487 |
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 347.00 mm | Product Guides N/A Seal Guides |
| 347 X 6 B-90 |
IntegrationID
N/A 124488 |
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 347.00 mm | Product Guides N/A Seal Guides |
| 348x6.00B70 |
IntegrationID
N/A 124489 |
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 348.00 mm | Product Guides N/A Seal Guides |
| 348 X 6 B-90 |
IntegrationID
N/A 124490 |
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 348.00 mm | Product Guides N/A Seal Guides |
| 350x6.00B70 |
IntegrationID
N/A 124491 |
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 350.00 mm | Product Guides N/A Seal Guides |
| 350 X 6 B-90 |
IntegrationID
N/A 124492 |
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 350.00 mm | Product Guides N/A Seal Guides |
| 355x6.00B70 |
IntegrationID
N/A 124493 |
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 355.00 mm | Product Guides N/A Seal Guides |
| 355 X 6 B-90 |
IntegrationID
N/A 124494 |
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 355.00 mm | Product Guides N/A Seal Guides |
| 358 X 6 B-70 |
IntegrationID
N/A 124495 |
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 358.00 mm | Product Guides N/A Seal Guides |
| 358 X 6 B-90 |
IntegrationID
N/A 124496 |
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 358.00 mm | Product Guides N/A Seal Guides |
| 360x6.00B70 |
IntegrationID
N/A 124497 |
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 360.00 mm | Product Guides N/A Seal Guides |
| 360 X 6 B-90 |
IntegrationID
N/A 124498 |
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 360.00 mm | Product Guides N/A Seal Guides |
| 365 X 6 B-70 |
IntegrationID
N/A 124499 |
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 365.00 mm | Product Guides N/A Seal Guides |
| 365 X 6 B-90 |
IntegrationID
N/A 124500 |
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 365.00 mm | Product Guides N/A Seal Guides |
| 368 X 6 B-70 |
IntegrationID
N/A 124501 |
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 368.00 mm | Product Guides N/A Seal Guides |
| 368 X 6 B-90 |
IntegrationID
N/A 124502 |
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 368.00 mm | Product Guides N/A Seal Guides |
| 370x6.00B70 |
IntegrationID
N/A 124503 |
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 370.00 mm | Product Guides N/A Seal Guides |
| 370 X 6 B-90 |
IntegrationID
N/A 124504 |
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 370.00 mm | Product Guides N/A Seal Guides |
| 375 X 6 B-70 |
IntegrationID
N/A 124505 |
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 375.00 mm | Product Guides N/A Seal Guides |
| 375 X 6 B-90 |
IntegrationID
N/A 124506 |
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 375.00 mm | Product Guides N/A Seal Guides |
| 376x6.00B70 |
IntegrationID
N/A 124507 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A V380 | Cross Section Width N/A 6.00 mm | Durometer N/A 70 | Inside Diameter N/A 376.00 mm | Product Guides N/A Seal Guides |
| 376 X 6 B-90 |
IntegrationID
N/A 124508 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A V380 | Cross Section Width N/A 6.00 mm | Durometer N/A 90 | Inside Diameter N/A 376.00 mm | Product Guides N/A Seal Guides |

