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
5.28 X 1.78 B-90	N/A 117646	N/A Metric Standard O-Ring	N/A Buna	N/A 9	N/A 1.78 mm	N/A 90	N/A 5.28 mm
6.07 X 1.78 B-70	N/A 117647	N/A Metric Standard O-Ring	N/A Buna	N/A 10	N/A 1.78 mm	N/A 70	N/A 6.07 mm
6.07 X 1.78 B-90	N/A 117648	N/A Metric Standard O-Ring	N/A Buna	N/A 10	N/A 1.78 mm	N/A 90	N/A 6.07 mm
6.35 X 1.78 B-70	N/A 117649	N/A Metric Standard O-Ring	N/A Buna	N/A BS803	N/A 1.78 mm	N/A 70	N/A 6.35 mm
6.35 X 1.78 B-90	N/A 117650	N/A Metric Standard O-Ring	N/A Buna	N/A BS803	N/A 1.78 mm	N/A 90	N/A 6.35 mm
6.75 X 1.78 B-70	N/A 117651	N/A Metric Standard O-Ring	N/A Buna	N/A BS610	N/A 1.78 mm	N/A 70	N/A 6.75 mm
6.75 X 1.78 B-90	N/A 117652	N/A Metric Standard O-Ring	N/A Buna	N/A BS610	N/A 1.78 mm	N/A 90	N/A 6.75 mm
7.65 X 1.78 B-70	N/A 117653	N/A Metric Standard O-Ring	N/A Buna	N/A 11	N/A 1.78 mm	N/A 70	N/A 7.65 mm
7.65 X 1.78 B-90	N/A 117654	N/A Metric Standard O-Ring	N/A Buna	N/A 11	N/A 1.78 mm	N/A 90	N/A 7.65 mm
7.94 X 1.78 B-70	N/A 117655	N/A Metric Standard O-Ring	N/A Buna	N/A BS804	N/A 1.78 mm	N/A 70	N/A 7.94 mm
7.94 X 1.78 B-90	N/A 117656	N/A Metric Standard O-Ring	N/A Buna	N/A BS804	N/A 1.78 mm	N/A 90	N/A 7.94 mm
8.73 X 1.78 B-70	N/A 117657	N/A Metric Standard O-Ring	N/A Buna	N/A BS611	N/A 1.78 mm	N/A 70	N/A 8.73 mm
8.73 X 1.78 B-90	N/A 117658	N/A Metric Standard O-Ring	N/A Buna	N/A BS611	N/A 1.78 mm	N/A 90	N/A 8.73 mm
9.25 X 1.78 B-70	N/A 117659	N/A Metric Standard O-Ring	N/A Buna	N/A 12	N/A 1.78 mm	N/A 70	N/A 9.25 mm
9.25 X 1.78 B-90	N/A 117660	N/A Metric Standard O-Ring	N/A Buna	N/A 12	N/A 1.78 mm	N/A 90	N/A 9.25 mm
9.52 X 1.78 B-70	N/A 117661	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.78 mm	N/A 70	N/A 9.52 mm
9.52 X 1.78 B-90	N/A 117662	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.78 mm	N/A 90	N/A 9.52 mm
10.82 X 1.78 B-70	N/A 117663	N/A Metric Standard O-Ring	N/A Buna	N/A 13	N/A 1.78 mm	N/A 70	N/A 10.82 mm
10.82 X 1.78 B-90	N/A 117664	N/A Metric Standard O-Ring	N/A Buna	N/A 13	N/A 1.78 mm	N/A 90	N/A 10.82 mm
11.11 X 1.78 B-70	N/A 117665	N/A Metric Standard O-Ring	N/A Buna	N/A BS806	N/A 1.78 mm	N/A 70	N/A 11.11 mm
11.11 X 1.78 B-90	N/A 117666	N/A Metric Standard O-Ring	N/A Buna	N/A BS806	N/A 1.78 mm	N/A 90	N/A 11.11 mm
11.91 X 1.78 B-70	N/A 117667	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.78 mm	N/A 70	N/A 11.91 mm
11.91 X 1.78 B-90	N/A 117668	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.78 mm	N/A 90	N/A 11.91 mm
12.42 X 1.78 B-70	N/A 117669	N/A Metric Standard O-Ring	N/A Buna	N/A 14	N/A 1.78 mm	N/A 70	N/A 12.42 mm
12.42 X 1.78 B-90	N/A 117670	N/A Metric Standard O-Ring	N/A Buna	N/A 14	N/A 1.78 mm	N/A 90	N/A 12.42 mm

N/A
117646

N/A Metric Standard O-Ring

N/A Buna

N/A 9

N/A 1.78 mm

N/A 90

N/A 5.28 mm

6.07 X 1.78 B-70

N/A
117647

N/A Metric Standard O-Ring

N/A Buna

N/A 10

N/A 1.78 mm

N/A 70

N/A 6.07 mm

6.07 X 1.78 B-90

N/A
117648

N/A Metric Standard O-Ring

N/A Buna

N/A 10

N/A 1.78 mm

N/A 90

N/A 6.07 mm

6.35 X 1.78 B-70

N/A
117649

N/A Metric Standard O-Ring

N/A Buna

N/A BS803

N/A 1.78 mm

N/A 70

N/A 6.35 mm

6.35 X 1.78 B-90

N/A
117650

N/A Metric Standard O-Ring

N/A Buna

N/A BS803

N/A 1.78 mm

N/A 90

N/A 6.35 mm

6.75 X 1.78 B-70

N/A
117651

N/A Metric Standard O-Ring

N/A Buna

N/A BS610

N/A 1.78 mm

N/A 70

N/A 6.75 mm

6.75 X 1.78 B-90

N/A
117652

N/A Metric Standard O-Ring

N/A Buna

N/A BS610

N/A 1.78 mm

N/A 90

N/A 6.75 mm

7.65 X 1.78 B-70

N/A
117653

N/A Metric Standard O-Ring

N/A Buna

N/A 11

N/A 1.78 mm

N/A 70

N/A 7.65 mm

7.65 X 1.78 B-90

N/A
117654

N/A Metric Standard O-Ring

N/A Buna

N/A 11

N/A 1.78 mm

N/A 90

N/A 7.65 mm

7.94 X 1.78 B-70

N/A
117655

N/A Metric Standard O-Ring

N/A Buna

N/A BS804

N/A 1.78 mm

N/A 70

N/A 7.94 mm

7.94 X 1.78 B-90

N/A
117656

N/A Metric Standard O-Ring

N/A Buna

N/A BS804

N/A 1.78 mm

N/A 90

N/A 7.94 mm

8.73 X 1.78 B-70

N/A
117657

N/A Metric Standard O-Ring

N/A Buna

N/A BS611

N/A 1.78 mm

N/A 70

N/A 8.73 mm

8.73 X 1.78 B-90

N/A
117658

N/A Metric Standard O-Ring

N/A Buna

N/A BS611

N/A 1.78 mm

N/A 90

N/A 8.73 mm

9.25 X 1.78 B-70

N/A
117659

N/A Metric Standard O-Ring

N/A Buna

N/A 12

N/A 1.78 mm

N/A 70

N/A 9.25 mm

9.25 X 1.78 B-90

N/A
117660

N/A Metric Standard O-Ring

N/A Buna

N/A 12

N/A 1.78 mm

N/A 90

N/A 9.25 mm

9.52 X 1.78 B-70

N/A
117661

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.78 mm

N/A 70

N/A 9.52 mm

9.52 X 1.78 B-90

N/A
117662

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.78 mm

N/A 90

N/A 9.52 mm

10.82 X 1.78 B-70

N/A
117663

N/A Metric Standard O-Ring

N/A Buna

N/A 13

N/A 1.78 mm

N/A 70

N/A 10.82 mm

10.82 X 1.78 B-90

N/A
117664

N/A Metric Standard O-Ring

N/A Buna

N/A 13

N/A 1.78 mm

N/A 90

N/A 10.82 mm

11.11 X 1.78 B-70

N/A
117665

N/A Metric Standard O-Ring

N/A Buna

N/A BS806

N/A 1.78 mm

N/A 70

N/A 11.11 mm

11.11 X 1.78 B-90

N/A
117666

N/A Metric Standard O-Ring

N/A Buna

N/A BS806

N/A 1.78 mm

N/A 90

N/A 11.11 mm

11.91 X 1.78 B-70

N/A
117667

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.78 mm

N/A 70

N/A 11.91 mm

11.91 X 1.78 B-90

N/A
117668

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.78 mm

N/A 90

N/A 11.91 mm

12.42 X 1.78 B-70

N/A
117669

N/A Metric Standard O-Ring

N/A Buna

N/A 14

N/A 1.78 mm

N/A 70

N/A 12.42 mm

12.42 X 1.78 B-90

N/A
117670

N/A Metric Standard O-Ring

N/A Buna

N/A 14

N/A 1.78 mm

N/A 90

N/A 12.42 mm