Metric Buna O-Rings

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
560 X 6 B-90	N/A 124586	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 560.00 mm	N/A Seal Guides
569 X 6 B-70	N/A 124587	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 569.00 mm	N/A Seal Guides
569 X 6 B-90	N/A 124588	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 569.00 mm	N/A Seal Guides
575x6.00B70	N/A 124589	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 575.00 mm	N/A Seal Guides
575 X 6 B-90	N/A 124590	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 575.00 mm	N/A Seal Guides
579 X 6 B-70	N/A 124591	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 579.00 mm	N/A Seal Guides
579 X 6 B-90	N/A 124592	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 579.00 mm	N/A Seal Guides
422.2 X 6.2 B-70	N/A 124593	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.20 mm	N/A 70	N/A 422.20 mm	N/A Seal Guides
422.2 X 6.2 B-90	N/A 124594	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.20 mm	N/A 90	N/A 422.20 mm	N/A Seal Guides
610 X 6.35 B-70	N/A 124595	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.35 mm	N/A 70	N/A 610.00 mm	N/A Seal Guides
610 X 6.35 B-90	N/A 124596	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.35 mm	N/A 90	N/A 610.00 mm	N/A Seal Guides
50 X 6.5 B-70	N/A 124597	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.50 mm	N/A 70	N/A 50.00 mm	N/A Seal Guides
50 X 6.5 B-90	N/A 124598	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.50 mm	N/A 90	N/A 50.00 mm	N/A Seal Guides
57 X 6.5 B-70	N/A 124599	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.50 mm	N/A 70	N/A 57.00 mm	N/A Seal Guides
57 X 6.5 B-90	N/A 124600	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.50 mm	N/A 90	N/A 57.00 mm	N/A Seal Guides
422.2 X 6.9 B-70	N/A 124601	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.90 mm	N/A 70	N/A 422.20 mm	N/A Seal Guides
422.2 X 6.9 B-90	N/A 124602	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.90 mm	N/A 90	N/A 422.20 mm	N/A Seal Guides
34.29 X 6.99 B-70	N/A 124603	N/A Metric Standard O-Ring	N/A Buna	N/A 400	N/A 6.99 mm	N/A 70	N/A 34.29 mm	N/A Seal Guides
34.29 X 6.99 B-90	N/A 124604	N/A Metric Standard O-Ring	N/A Buna	N/A 400	N/A 6.99 mm	N/A 90	N/A 34.29 mm	N/A Seal Guides
37.47 X 6.99 B-70	N/A 124605	N/A Metric Standard O-Ring	N/A Buna	N/A 401	N/A 6.99 mm	N/A 70	N/A 37.47 mm	N/A Seal Guides
37.47 X 6.99 B-90	N/A 124606	N/A Metric Standard O-Ring	N/A Buna	N/A 401	N/A 6.99 mm	N/A 90	N/A 37.47 mm	N/A Seal Guides
40.64 X 6.99 B-70	N/A 124607	N/A Metric Standard O-Ring	N/A Buna	N/A 402	N/A 6.99 mm	N/A 70	N/A 40.64 mm	N/A Seal Guides
40.64 X 6.99 B-90	N/A 124608	N/A Metric Standard O-Ring	N/A Buna	N/A 402	N/A 6.99 mm	N/A 90	N/A 40.64 mm	N/A Seal Guides
43.82 X 6.99 B-70	N/A 124609	N/A Metric Standard O-Ring	N/A Buna	N/A 403	N/A 6.99 mm	N/A 70	N/A 43.82 mm	N/A Seal Guides
43.82 X 6.99 B-90	N/A 124610	N/A Metric Standard O-Ring	N/A Buna	N/A 403	N/A 6.99 mm	N/A 90	N/A 43.82 mm	N/A Seal Guides

N/A
124586

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 560.00 mm

N/A Seal Guides

569 X 6 B-70

N/A
124587

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 569.00 mm

N/A Seal Guides

569 X 6 B-90

N/A
124588

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 569.00 mm

N/A Seal Guides

575x6.00B70

N/A
124589

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 575.00 mm

N/A Seal Guides

575 X 6 B-90

N/A
124590

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 575.00 mm

N/A Seal Guides

579 X 6 B-70

N/A
124591

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 579.00 mm

N/A Seal Guides

579 X 6 B-90

N/A
124592

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 579.00 mm

N/A Seal Guides

422.2 X 6.2 B-70

N/A
124593

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.20 mm

N/A 70

N/A 422.20 mm

N/A Seal Guides

422.2 X 6.2 B-90

N/A
124594

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.20 mm

N/A 90

N/A 422.20 mm

N/A Seal Guides

610 X 6.35 B-70

N/A
124595

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.35 mm

N/A 70

N/A 610.00 mm

N/A Seal Guides

610 X 6.35 B-90

N/A
124596

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.35 mm

N/A 90

N/A 610.00 mm

N/A Seal Guides

50 X 6.5 B-70

N/A
124597

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.50 mm

N/A 70

N/A 50.00 mm

N/A Seal Guides

50 X 6.5 B-90

N/A
124598

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.50 mm

N/A 90

N/A 50.00 mm

N/A Seal Guides

57 X 6.5 B-70

N/A
124599

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.50 mm

N/A 70

N/A 57.00 mm

N/A Seal Guides

57 X 6.5 B-90

N/A
124600

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.50 mm

N/A 90

N/A 57.00 mm

N/A Seal Guides

422.2 X 6.9 B-70

N/A
124601

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.90 mm

N/A 70

N/A 422.20 mm

N/A Seal Guides

422.2 X 6.9 B-90

N/A
124602

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.90 mm

N/A 90

N/A 422.20 mm

N/A Seal Guides

34.29 X 6.99 B-70

N/A
124603

N/A Metric Standard O-Ring

N/A Buna

N/A 400

N/A 6.99 mm

N/A 70

N/A 34.29 mm

N/A Seal Guides

34.29 X 6.99 B-90

N/A
124604

N/A Metric Standard O-Ring

N/A Buna

N/A 400

N/A 6.99 mm

N/A 90

N/A 34.29 mm

N/A Seal Guides

37.47 X 6.99 B-70

N/A
124605

N/A Metric Standard O-Ring

N/A Buna

N/A 401

N/A 6.99 mm

N/A 70

N/A 37.47 mm

N/A Seal Guides

37.47 X 6.99 B-90

N/A
124606

N/A Metric Standard O-Ring

N/A Buna

N/A 401

N/A 6.99 mm

N/A 90

N/A 37.47 mm

N/A Seal Guides

40.64 X 6.99 B-70

N/A
124607

N/A Metric Standard O-Ring

N/A Buna

N/A 402

N/A 6.99 mm

N/A 70

N/A 40.64 mm

N/A Seal Guides

40.64 X 6.99 B-90

N/A
124608

N/A Metric Standard O-Ring

N/A Buna

N/A 402

N/A 6.99 mm

N/A 90

N/A 40.64 mm

N/A Seal Guides

43.82 X 6.99 B-70

N/A
124609

N/A Metric Standard O-Ring

N/A Buna

N/A 403

N/A 6.99 mm

N/A 70

N/A 43.82 mm

N/A Seal Guides

43.82 X 6.99 B-90

N/A
124610

N/A Metric Standard O-Ring

N/A Buna

N/A 403

N/A 6.99 mm

N/A 90

N/A 43.82 mm

N/A Seal Guides