Monroe
OneMonroe
Locations Throughout the Country
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Tel: (877) 740-2007
Fax: (800) 453-9683
Email: sales@askmonroe.com
Website: monroeengineering.com
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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.

Metric O-Rings
Unit of Measure
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Item #

IntegrationID

Type

Material

Cross Reference

Cross Section Width

Durometer

Inside Diameter

Product Guides

Quantity
209.3 X 5.7 B-90 N/A
123978 		N/A Metric Standard O-Ring N/A Buna N/A G210 N/A 5.70 mm N/A 90 N/A 209.30 mm N/A Seal Guides
219.3 X 5.7 B-70 N/A
123979 		N/A Metric Standard O-Ring N/A Buna N/A G220 N/A 5.70 mm N/A 70 N/A 219.30 mm N/A Seal Guides
219.3 X 5.7 B-90 N/A
123980 		N/A Metric Standard O-Ring N/A Buna N/A G220 N/A 5.70 mm N/A 90 N/A 219.30 mm N/A Seal Guides
229.3 X 5.7 B-70 N/A
123981 		N/A Metric Standard O-Ring N/A Buna N/A G230 N/A 5.70 mm N/A 70 N/A 229.30 mm N/A Seal Guides
229.3 X 5.7 B-90 N/A
123982 		N/A Metric Standard O-Ring N/A Buna N/A G230 N/A 5.70 mm N/A 90 N/A 229.30 mm N/A Seal Guides
234.3 X 5.7 B-70 N/A
123983 		N/A Metric Standard O-Ring N/A Buna N/A N/A 5.70 mm N/A 70 N/A 234.30 mm N/A Seal Guides
234.3 X 5.7 B-90 N/A
123984 		N/A Metric Standard O-Ring N/A Buna N/A N/A 5.70 mm N/A 90 N/A 234.30 mm N/A Seal Guides
239.3 X 5.7 B-70 N/A
123985 		N/A Metric Standard O-Ring N/A Buna N/A G240 N/A 5.70 mm N/A 70 N/A 239.30 mm N/A Seal Guides
239.3 X 5.7 B-90 N/A
123986 		N/A Metric Standard O-Ring N/A Buna N/A G240 N/A 5.70 mm N/A 90 N/A 239.30 mm N/A Seal Guides
249.3 X 5.7 B-70 N/A
123987 		N/A Metric Standard O-Ring N/A Buna N/A G250 N/A 5.70 mm N/A 70 N/A 249.30 mm N/A Seal Guides
249.3 X 5.7 B-90 N/A
123988 		N/A Metric Standard O-Ring N/A Buna N/A G250 N/A 5.70 mm N/A 90 N/A 249.30 mm N/A Seal Guides
259.3 X 5.7 B-70 N/A
123989 		N/A Metric Standard O-Ring N/A Buna N/A G260 N/A 5.70 mm N/A 70 N/A 259.30 mm N/A Seal Guides
259.3 X 5.7 B-90 N/A
123990 		N/A Metric Standard O-Ring N/A Buna N/A G260 N/A 5.70 mm N/A 90 N/A 259.30 mm N/A Seal Guides
269.3 X 5.7 B-70 N/A
123991 		N/A Metric Standard O-Ring N/A Buna N/A G270 N/A 5.70 mm N/A 70 N/A 269.30 mm N/A Seal Guides
269.3 X 5.7 B-90 N/A
123992 		N/A Metric Standard O-Ring N/A Buna N/A G270 N/A 5.70 mm N/A 90 N/A 269.30 mm N/A Seal Guides
279.3 X 5.7 B-70 N/A
123993 		N/A Metric Standard O-Ring N/A Buna N/A G280 N/A 5.70 mm N/A 70 N/A 279.30 mm N/A Seal Guides
279.3 X 5.7 B-90 N/A
123994 		N/A Metric Standard O-Ring N/A Buna N/A G280 N/A 5.70 mm N/A 90 N/A 279.30 mm N/A Seal Guides
269.2 X 5.7 B-70 N/A
123995 		N/A Metric Standard O-Ring N/A Buna N/A N/A 5.70 mm N/A 70 N/A 269.20 mm N/A Seal Guides
269.2 X 5.7 B-90 N/A
123996 		N/A Metric Standard O-Ring N/A Buna N/A N/A 5.70 mm N/A 90 N/A 269.20 mm N/A Seal Guides
289.3 X 5.7 B-70 N/A
123997 		N/A Metric Standard O-Ring N/A Buna N/A G290 N/A 5.70 mm N/A 70 N/A 289.30 mm N/A Seal Guides
289.3 X 5.7 B-90 N/A
123998 		N/A Metric Standard O-Ring N/A Buna N/A G290 N/A 5.70 mm N/A 90 N/A 289.30 mm N/A Seal Guides
299.3 X 5.7 B-70 N/A
123999 		N/A Metric Standard O-Ring N/A Buna N/A G300 N/A 5.70 mm N/A 70 N/A 299.30 mm N/A Seal Guides
299.3 X 5.7 B-90 N/A
124000 		N/A Metric Standard O-Ring N/A Buna N/A G300 N/A 5.70 mm N/A 90 N/A 299.30 mm N/A Seal Guides
319.3 X 5.7 B-70 N/A
124001 		N/A Metric Standard O-Ring N/A Buna N/A N/A 5.70 mm N/A 70 N/A 319.30 mm N/A Seal Guides
319.3 X 5.7 B-90 N/A
124002 		N/A Metric Standard O-Ring N/A Buna N/A N/A 5.70 mm N/A 90 N/A 319.30 mm N/A Seal Guides
Unit of Measure
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