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 |
|---|---|---|---|---|---|---|---|---|
| 230 X 7 B-90 |
IntegrationID
N/A 124836 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 90 | Inside Diameter N/A 230.00 mm | Product Guides N/A Seal Guides |
| 236x7.00B70 |
IntegrationID
N/A 124837 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 70 | Inside Diameter N/A 236.00 mm | Product Guides N/A Seal Guides |
| 236 X 7 B-90 |
IntegrationID
N/A 124838 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 90 | Inside Diameter N/A 236.00 mm | Product Guides N/A Seal Guides |
| 243x7.00B70 |
IntegrationID
N/A 124839 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 70 | Inside Diameter N/A 243.00 mm | Product Guides N/A Seal Guides |
| 243 X 7 B-90 |
IntegrationID
N/A 124840 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 90 | Inside Diameter N/A 243.00 mm | Product Guides N/A Seal Guides |
| 250x7.00B70 |
IntegrationID
N/A 124841 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 70 | Inside Diameter N/A 250.00 mm | Product Guides N/A Seal Guides |
| 250 X 7 B-90 |
IntegrationID
N/A 124842 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 90 | Inside Diameter N/A 250.00 mm | Product Guides N/A Seal Guides |
| 250.37 X 7 B-70 |
IntegrationID
N/A 124843 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 70 | Inside Diameter N/A 250.37 mm | Product Guides N/A Seal Guides |
| 250.37 X 7 B-90 |
IntegrationID
N/A 124844 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 90 | Inside Diameter N/A 250.37 mm | Product Guides N/A Seal Guides |
| 258x7.00B70 |
IntegrationID
N/A 124845 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 70 | Inside Diameter N/A 258.00 mm | Product Guides N/A Seal Guides |
| 258 X 7 B-90 |
IntegrationID
N/A 124846 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 90 | Inside Diameter N/A 258.00 mm | Product Guides N/A Seal Guides |
| 265x7.00B70 |
IntegrationID
N/A 124847 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 70 | Inside Diameter N/A 265.00 mm | Product Guides N/A Seal Guides |
| 265 X 7 B-90 |
IntegrationID
N/A 124848 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 90 | Inside Diameter N/A 265.00 mm | Product Guides N/A Seal Guides |
| 272x7.00B70 |
IntegrationID
N/A 124849 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 70 | Inside Diameter N/A 272.00 mm | Product Guides N/A Seal Guides |
| 272 X 7 B-90 |
IntegrationID
N/A 124850 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 90 | Inside Diameter N/A 272.00 mm | Product Guides N/A Seal Guides |
| 280 X 7 B-70 |
IntegrationID
N/A 124851 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 70 | Inside Diameter N/A 280.00 mm | Product Guides N/A Seal Guides |
| 280 X 7 B-90 |
IntegrationID
N/A 124852 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 90 | Inside Diameter N/A 280.00 mm | Product Guides N/A Seal Guides |
| 290 X 7 B-70 |
IntegrationID
N/A 124853 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 70 | Inside Diameter N/A 290.00 mm | Product Guides N/A Seal Guides |
| 290 X 7 B-90 |
IntegrationID
N/A 124854 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 90 | Inside Diameter N/A 290.00 mm | Product Guides N/A Seal Guides |
| 300x7.00B70 |
IntegrationID
N/A 124855 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 70 | Inside Diameter N/A 300.00 mm | Product Guides N/A Seal Guides |
| 300 X 7 B-90 |
IntegrationID
N/A 124856 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 90 | Inside Diameter N/A 300.00 mm | Product Guides N/A Seal Guides |
| 307 X 7 B-70 |
IntegrationID
N/A 124857 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 70 | Inside Diameter N/A 307.00 mm | Product Guides N/A Seal Guides |
| 307 X 7 B-90 |
IntegrationID
N/A 124858 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 90 | Inside Diameter N/A 307.00 mm | Product Guides N/A Seal Guides |
| 315x7.00B70 |
IntegrationID
N/A 124859 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 70 | Inside Diameter N/A 315.00 mm | Product Guides N/A Seal Guides |
| 315 X 7 B-90 |
IntegrationID
N/A 124860 |
Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 7.00 mm | Durometer N/A 90 | Inside Diameter N/A 315.00 mm | Product Guides N/A Seal Guides |

