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
7.8 X 1.9 B-90	N/A 117898	N/A Metric Standard O-Ring	N/A Buna	N/A P8	N/A 1.90 mm	N/A 90	N/A 7.80 mm
8x1.90B70	N/A 117899	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 70	N/A 8.00 mm
8 X 1.9 B-90	N/A 117900	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 90	N/A 8.00 mm
8.8x1.90B70	N/A 117901	N/A Metric Standard O-Ring	N/A Buna	N/A P9	N/A 1.90 mm	N/A 70	N/A 8.80 mm
8.8 X 1.9 B-90	N/A 117902	N/A Metric Standard O-Ring	N/A Buna	N/A P9	N/A 1.90 mm	N/A 90	N/A 8.80 mm
8.9 X 1.9 B-70	N/A 117903	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 70	N/A 8.90 mm
8.9 X 1.9 B-90	N/A 117904	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 90	N/A 8.90 mm
9.8x1.90B70	N/A 117905	N/A Metric Standard O-Ring	N/A Buna	N/A P10	N/A 1.90 mm	N/A 70	N/A 9.80 mm
9.8 X 1.9 B-90	N/A 117906	N/A Metric Standard O-Ring	N/A Buna	N/A P10	N/A 1.90 mm	N/A 90	N/A 9.80 mm
67.1 X 1.92 B-70	N/A 117907	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.92 mm	N/A 70	N/A 67.10 mm
67.1 X 1.92 B-90	N/A 117908	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.92 mm	N/A 90	N/A 67.10 mm
11.89 X 1.98 B-70	N/A 117909	N/A Metric Standard O-Ring	N/A Buna	N/A 906	N/A 1.98 mm	N/A 70	N/A 11.89 mm
11.89 X 1.98 B-90	N/A 117910	N/A Metric Standard O-Ring	N/A Buna	N/A 906	N/A 1.98 mm	N/A 90	N/A 11.89 mm
2x2.00B70	N/A 117911	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 2.00 mm
2 X 2 B-90	N/A 117912	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 2.00 mm
2.5x2.00B70	N/A 117913	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 2.50 mm
2.5 X 2 B-90	N/A 117914	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 2.50 mm
2.6 X 2 B-70	N/A 117915	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 2.60 mm
2.6 X 2 B-90	N/A 117916	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 2.60 mm
3x2.00B70	N/A 117917	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 3.00 mm
3 X 2 B-90	N/A 117918	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 3.00 mm
3.5x2.00B70	N/A 117919	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 3.50 mm
3.5 X 2 B-90	N/A 117920	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 3.50 mm
4x2.00B70	N/A 117921	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 4.00 mm
4 X 2 B-90	N/A 117922	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 4.00 mm

N/A
117898

N/A Metric Standard O-Ring

N/A Buna

N/A P8

N/A 1.90 mm

N/A 90

N/A 7.80 mm

8x1.90B70

N/A
117899

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 70

N/A 8.00 mm

8 X 1.9 B-90

N/A
117900

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 90

N/A 8.00 mm

8.8x1.90B70

N/A
117901

N/A Metric Standard O-Ring

N/A Buna

N/A P9

N/A 1.90 mm

N/A 70

N/A 8.80 mm

8.8 X 1.9 B-90

N/A
117902

N/A Metric Standard O-Ring

N/A Buna

N/A P9

N/A 1.90 mm

N/A 90

N/A 8.80 mm

8.9 X 1.9 B-70

N/A
117903

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 70

N/A 8.90 mm

8.9 X 1.9 B-90

N/A
117904

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 90

N/A 8.90 mm

9.8x1.90B70

N/A
117905

N/A Metric Standard O-Ring

N/A Buna

N/A P10

N/A 1.90 mm

N/A 70

N/A 9.80 mm

9.8 X 1.9 B-90

N/A
117906

N/A Metric Standard O-Ring

N/A Buna

N/A P10

N/A 1.90 mm

N/A 90

N/A 9.80 mm

67.1 X 1.92 B-70

N/A
117907

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.92 mm

N/A 70

N/A 67.10 mm

67.1 X 1.92 B-90

N/A
117908

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.92 mm

N/A 90

N/A 67.10 mm

11.89 X 1.98 B-70

N/A
117909

N/A Metric Standard O-Ring

N/A Buna

N/A 906

N/A 1.98 mm

N/A 70

N/A 11.89 mm

11.89 X 1.98 B-90

N/A
117910

N/A Metric Standard O-Ring

N/A Buna

N/A 906

N/A 1.98 mm

N/A 90

N/A 11.89 mm

2x2.00B70

N/A
117911

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 2.00 mm

2 X 2 B-90

N/A
117912

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 2.00 mm

2.5x2.00B70

N/A
117913

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 2.50 mm

2.5 X 2 B-90

N/A
117914

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 2.50 mm

2.6 X 2 B-70

N/A
117915

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 2.60 mm

2.6 X 2 B-90

N/A
117916

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 2.60 mm

3x2.00B70

N/A
117917

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 3.00 mm

3 X 2 B-90

N/A
117918

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 3.00 mm

3.5x2.00B70

N/A
117919

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 3.50 mm

3.5 X 2 B-90

N/A
117920

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 3.50 mm

4x2.00B70

N/A
117921

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 4.00 mm

4 X 2 B-90

N/A
117922

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 4.00 mm