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 |
|---|---|---|---|---|---|---|---|---|
| 380x6.00B70 |
IntegrationID
N/A 124511 |
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 380.00 mm | Product Guides N/A Seal Guides |
| 380 X 6 B-90 |
IntegrationID
N/A 124512 |
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 380.00 mm | Product Guides N/A Seal Guides |
| 385 X 6 B-70 |
IntegrationID
N/A 124513 |
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 385.00 mm | Product Guides N/A Seal Guides |
| 385 X 6 B-90 |
IntegrationID
N/A 124514 |
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 385.00 mm | Product Guides N/A Seal Guides |
| 386 X 6 B-70 |
IntegrationID
N/A 124515 |
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 386.00 mm | Product Guides N/A Seal Guides |
| 386 X 6 B-90 |
IntegrationID
N/A 124516 |
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 386.00 mm | Product Guides N/A Seal Guides |
| 388 X 6 B-70 |
IntegrationID
N/A 124517 |
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 388.00 mm | Product Guides N/A Seal Guides |
| 388 X 6 B-90 |
IntegrationID
N/A 124518 |
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 388.00 mm | Product Guides N/A Seal Guides |
| 389 X 6 B-70 |
IntegrationID
N/A 124519 |
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 389.00 mm | Product Guides N/A Seal Guides |
| 389 X 6 B-90 |
IntegrationID
N/A 124520 |
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 389.00 mm | Product Guides N/A Seal Guides |
| 390x6.00B70 |
IntegrationID
N/A 124521 |
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 390.00 mm | Product Guides N/A Seal Guides |
| 390 X 6 B-90 |
IntegrationID
N/A 124522 |
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 390.00 mm | Product Guides N/A Seal Guides |
| 392 X 6 B-70 |
IntegrationID
N/A 124523 |
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 392.00 mm | Product Guides N/A Seal Guides |
| 392 X 6 B-90 |
IntegrationID
N/A 124524 |
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 392.00 mm | Product Guides N/A Seal Guides |
| 394x6.00B70 |
IntegrationID
N/A 124525 |
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 394.00 mm | Product Guides N/A Seal Guides |
| 394 X 6 B-90 |
IntegrationID
N/A 124526 |
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 394.00 mm | Product Guides N/A Seal Guides |
| 395x6.00B70 |
IntegrationID
N/A 124527 |
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 395.00 mm | Product Guides N/A Seal Guides |
| 395 X 6 B-90 |
IntegrationID
N/A 124528 |
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 395.00 mm | Product Guides N/A Seal Guides |
| 398 X 6 B-70 |
IntegrationID
N/A 124529 |
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 398.00 mm | Product Guides N/A Seal Guides |
| 398 X 6 B-90 |
IntegrationID
N/A 124530 |
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 398.00 mm | Product Guides N/A Seal Guides |
| 400x6.00B70 |
IntegrationID
N/A 124531 |
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 400.00 mm | Product Guides N/A Seal Guides |
| 400 X 6 B-90 |
IntegrationID
N/A 124532 |
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 400.00 mm | Product Guides N/A Seal Guides |
| 415x6.00B70 |
IntegrationID
N/A 124533 |
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 415.00 mm | Product Guides N/A Seal Guides |
| 415 X 6 B-90 |
IntegrationID
N/A 124534 |
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 415.00 mm | Product Guides N/A Seal Guides |
| 422 X 6 B-70 |
IntegrationID
N/A 124535 |
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 422.00 mm | Product Guides N/A Seal Guides |

