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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
253.37 X 6.99 B-90 N/A
124736
N/A Metric Standard O-Ring N/A Buna N/A 4491 N/A 6.99 mm N/A 90 N/A 253.37 mm N/A Seal Guides
259.7 X 6.99 B-70 N/A
124737
N/A Metric Standard O-Ring N/A Buna N/A BS682 N/A 6.99 mm N/A 70 N/A 259.70 mm N/A Seal Guides
259.7 X 6.99 B-90 N/A
124738
N/A Metric Standard O-Ring N/A Buna N/A BS682 N/A 6.99 mm N/A 90 N/A 259.70 mm N/A Seal Guides
266.07 X 6.99 B-70 N/A
124739
N/A Metric Standard O-Ring N/A Buna N/A 450 N/A 6.99 mm N/A 70 N/A 266.07 mm N/A Seal Guides
266.07 X 6.99 B-90 N/A
124740
N/A Metric Standard O-Ring N/A Buna N/A 450 N/A 6.99 mm N/A 90 N/A 266.07 mm N/A Seal Guides
272.4 X 6.99 B-70 N/A
124741
N/A Metric Standard O-Ring N/A Buna N/A BS684 N/A 6.99 mm N/A 70 N/A 272.40 mm N/A Seal Guides
272.4 X 6.99 B-90 N/A
124742
N/A Metric Standard O-Ring N/A Buna N/A BS684 N/A 6.99 mm N/A 90 N/A 272.40 mm N/A Seal Guides
278.77 X 6.99 B-70 N/A
124743
N/A Metric Standard O-Ring N/A Buna N/A 451 N/A 6.99 mm N/A 70 N/A 278.77 mm N/A Seal Guides
278.77 X 6.99 B-90 N/A
124744
N/A Metric Standard O-Ring N/A Buna N/A 451 N/A 6.99 mm N/A 90 N/A 278.77 mm N/A Seal Guides
285.1 X 6.99 B-70 N/A
124745
N/A Metric Standard O-Ring N/A Buna N/A BS686 N/A 6.99 mm N/A 70 N/A 285.10 mm N/A Seal Guides
285.1 X 6.99 B-90 N/A
124746
N/A Metric Standard O-Ring N/A Buna N/A BS686 N/A 6.99 mm N/A 90 N/A 285.10 mm N/A Seal Guides
291.47 X 6.99 B-70 N/A
124747
N/A Metric Standard O-Ring N/A Buna N/A 452 N/A 6.99 mm N/A 70 N/A 291.47 mm N/A Seal Guides
291.47 X 6.99 B-90 N/A
124748
N/A Metric Standard O-Ring N/A Buna N/A 452 N/A 6.99 mm N/A 90 N/A 291.47 mm N/A Seal Guides
297.8 X 6.99 B-70 N/A
124749
N/A Metric Standard O-Ring N/A Buna N/A BS688 N/A 6.99 mm N/A 70 N/A 297.80 mm N/A Seal Guides
297.8 X 6.99 B-90 N/A
124750
N/A Metric Standard O-Ring N/A Buna N/A BS688 N/A 6.99 mm N/A 90 N/A 297.80 mm N/A Seal Guides
304.17 X 6.99 B-70 N/A
124751
N/A Metric Standard O-Ring N/A Buna N/A 453 N/A 6.99 mm N/A 70 N/A 304.17 mm N/A Seal Guides
304.17 X 6.99 B-90 N/A
124752
N/A Metric Standard O-Ring N/A Buna N/A 453 N/A 6.99 mm N/A 90 N/A 304.17 mm N/A Seal Guides
310.5 X 6.99 B-70 N/A
124753
N/A Metric Standard O-Ring N/A Buna N/A BS648 N/A 6.99 mm N/A 70 N/A 310.50 mm N/A Seal Guides
310.5 X 6.99 B-90 N/A
124754
N/A Metric Standard O-Ring N/A Buna N/A BS648 N/A 6.99 mm N/A 90 N/A 310.50 mm N/A Seal Guides
316.87 X 6.99 B-70 N/A
124755
N/A Metric Standard O-Ring N/A Buna N/A 454 N/A 6.99 mm N/A 70 N/A 316.87 mm N/A Seal Guides
316.87 X 6.99 B-90 N/A
124756
N/A Metric Standard O-Ring N/A Buna N/A 454 N/A 6.99 mm N/A 90 N/A 316.87 mm N/A Seal Guides
323.2 X 6.99 B-70 N/A
124757
N/A Metric Standard O-Ring N/A Buna N/A BS649 N/A 6.99 mm N/A 70 N/A 323.20 mm N/A Seal Guides
323.2 X 6.99 B-90 N/A
124758
N/A Metric Standard O-Ring N/A Buna N/A BS649 N/A 6.99 mm N/A 90 N/A 323.20 mm N/A Seal Guides
329.57 X 6.99 B-70 N/A
124759
N/A Metric Standard O-Ring N/A Buna N/A 455 N/A 6.99 mm N/A 70 N/A 329.57 mm N/A Seal Guides
329.57 X 6.99 B-90 N/A
124760
N/A Metric Standard O-Ring N/A Buna N/A 455 N/A 6.99 mm N/A 90 N/A 329.57 mm N/A Seal Guides
Unit of Measure
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