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
519.3 X 5.7 B-90	N/A 124028	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.70 mm	N/A 90	N/A 519.30 mm	N/A Seal Guides
529.3 X 5.7 B-70	N/A 124029	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.70 mm	N/A 70	N/A 529.30 mm	N/A Seal Guides
529.3 X 5.7 B-90	N/A 124030	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.70 mm	N/A 90	N/A 529.30 mm	N/A Seal Guides
594 X 5.7 B-70	N/A 124031	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.70 mm	N/A 70	N/A 594.00 mm	N/A Seal Guides
594 X 5.7 B-90	N/A 124032	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.70 mm	N/A 90	N/A 594.00 mm	N/A Seal Guides
594.3 X 5.7 B-70	N/A 124033	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.70 mm	N/A 70	N/A 594.30 mm	N/A Seal Guides
594.3 X 5.7 B-90	N/A 124034	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.70 mm	N/A 90	N/A 594.30 mm	N/A Seal Guides
725 X 5.7 B-70	N/A 124035	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.70 mm	N/A 70	N/A 725.00 mm	N/A Seal Guides
725 X 5.7 B-90	N/A 124036	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.70 mm	N/A 90	N/A 725.00 mm	N/A Seal Guides
11.7 X 5.8 B-70	N/A 124037	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.80 mm	N/A 70	N/A 11.70 mm	N/A Seal Guides
11.7 X 5.8 B-90	N/A 124038	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.80 mm	N/A 90	N/A 11.70 mm	N/A Seal Guides
218 X 5.8 B-70	N/A 124039	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.80 mm	N/A 70	N/A 218.00 mm	N/A Seal Guides
218 X 5.8 B-90	N/A 124040	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.80 mm	N/A 90	N/A 218.00 mm	N/A Seal Guides
6x6.00B70	N/A 124041	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 6.00 mm	N/A Seal Guides
6 X 6 B-90	N/A 124042	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 6.00 mm	N/A Seal Guides
7x6.00B70	N/A 124043	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 7.00 mm	N/A Seal Guides
7 X 6 B-90	N/A 124044	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 7.00 mm	N/A Seal Guides
9x6.00B70	N/A 124045	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 9.00 mm	N/A Seal Guides
9 X 6 B-90	N/A 124046	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 9.00 mm	N/A Seal Guides
10x6.00B70	N/A 124047	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 10.00 mm	N/A Seal Guides
10 X 6 B-90	N/A 124048	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 10.00 mm	N/A Seal Guides
11x6.00B70	N/A 124049	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 11.00 mm	N/A Seal Guides
11 X 6 B-90	N/A 124050	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 11.00 mm	N/A Seal Guides
12x6.00B70	N/A 124051	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 12.00 mm	N/A Seal Guides
12 X 6 B-90	N/A 124052	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 12.00 mm	N/A Seal Guides

N/A
124028

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.70 mm

N/A 90

N/A 519.30 mm

N/A Seal Guides

529.3 X 5.7 B-70

N/A
124029

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.70 mm

N/A 70

N/A 529.30 mm

N/A Seal Guides

529.3 X 5.7 B-90

N/A
124030

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.70 mm

N/A 90

N/A 529.30 mm

N/A Seal Guides

594 X 5.7 B-70

N/A
124031

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.70 mm

N/A 70

N/A 594.00 mm

N/A Seal Guides

594 X 5.7 B-90

N/A
124032

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.70 mm

N/A 90

N/A 594.00 mm

N/A Seal Guides

594.3 X 5.7 B-70

N/A
124033

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.70 mm

N/A 70

N/A 594.30 mm

N/A Seal Guides

594.3 X 5.7 B-90

N/A
124034

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.70 mm

N/A 90

N/A 594.30 mm

N/A Seal Guides

725 X 5.7 B-70

N/A
124035

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.70 mm

N/A 70

N/A 725.00 mm

N/A Seal Guides

725 X 5.7 B-90

N/A
124036

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.70 mm

N/A 90

N/A 725.00 mm

N/A Seal Guides

11.7 X 5.8 B-70

N/A
124037

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.80 mm

N/A 70

N/A 11.70 mm

N/A Seal Guides

11.7 X 5.8 B-90

N/A
124038

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.80 mm

N/A 90

N/A 11.70 mm

N/A Seal Guides

218 X 5.8 B-70

N/A
124039

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.80 mm

N/A 70

N/A 218.00 mm

N/A Seal Guides

218 X 5.8 B-90

N/A
124040

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.80 mm

N/A 90

N/A 218.00 mm

N/A Seal Guides

6x6.00B70

N/A
124041

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 6.00 mm

N/A Seal Guides

6 X 6 B-90

N/A
124042

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 6.00 mm

N/A Seal Guides

7x6.00B70

N/A
124043

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 7.00 mm

N/A Seal Guides

7 X 6 B-90

N/A
124044

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 7.00 mm

N/A Seal Guides

9x6.00B70

N/A
124045

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 9.00 mm

N/A Seal Guides

9 X 6 B-90

N/A
124046

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 9.00 mm

N/A Seal Guides

10x6.00B70

N/A
124047

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 10.00 mm

N/A Seal Guides

10 X 6 B-90

N/A
124048

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 10.00 mm

N/A Seal Guides

11x6.00B70

N/A
124049

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 11.00 mm

N/A Seal Guides

11 X 6 B-90

N/A
124050

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 11.00 mm

N/A Seal Guides

12x6.00B70

N/A
124051

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 12.00 mm

N/A Seal Guides

12 X 6 B-90

N/A
124052

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 12.00 mm

N/A Seal Guides