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
2.8x1.90B70	N/A 117873	N/A Metric Standard O-Ring	N/A Buna	N/A P3	N/A 1.90 mm	N/A 70	N/A 2.80 mm	N/A Seal Guides
2.8 X 1.9 B-90	N/A 117874	N/A Metric Standard O-Ring	N/A Buna	N/A P3	N/A 1.90 mm	N/A 90	N/A 2.80 mm	N/A Seal Guides
3.4x1.90B70	N/A 117875	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 70	N/A 3.40 mm	N/A Seal Guides
3.4 X 1.9 B-90	N/A 117876	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 90	N/A 3.40 mm	N/A Seal Guides
370 X 1.9 B-70	N/A 117877	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 70	N/A 370.00 mm	N/A Seal Guides
370 X 1.9 B-90	N/A 117878	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 90	N/A 370.00 mm	N/A Seal Guides
3.8x1.90B70	N/A 117879	N/A Metric Standard O-Ring	N/A Buna	N/A P4	N/A 1.90 mm	N/A 70	N/A 3.80 mm	N/A Seal Guides
3.8 X 1.9 B-90	N/A 117880	N/A Metric Standard O-Ring	N/A Buna	N/A P4	N/A 1.90 mm	N/A 90	N/A 3.80 mm	N/A Seal Guides
4.2x1.90B70	N/A 117881	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 70	N/A 4.20 mm	N/A Seal Guides
4.2 X 1.9 B-90	N/A 117882	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 90	N/A 4.20 mm	N/A Seal Guides
4.8x1.90B70	N/A 117883	N/A Metric Standard O-Ring	N/A Buna	N/A P5	N/A 1.90 mm	N/A 70	N/A 4.80 mm	N/A Seal Guides
4.8 X 1.9 B-90	N/A 117884	N/A Metric Standard O-Ring	N/A Buna	N/A P5	N/A 1.90 mm	N/A 90	N/A 4.80 mm	N/A Seal Guides
4.9 X 1.9 B-70	N/A 117885	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 70	N/A 4.90 mm	N/A Seal Guides
4.9 X 1.9 B-90	N/A 117886	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 90	N/A 4.90 mm	N/A Seal Guides
570 X 1.9 B-70	N/A 117887	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 70	N/A 570.00 mm	N/A Seal Guides
570 X 1.9 B-90	N/A 117888	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 90	N/A 570.00 mm	N/A Seal Guides
5.8x1.90B70	N/A 117889	N/A Metric Standard O-Ring	N/A Buna	N/A P6	N/A 1.90 mm	N/A 70	N/A 5.80 mm	N/A Seal Guides
5.8 X 1.9 B-90	N/A 117890	N/A Metric Standard O-Ring	N/A Buna	N/A P6	N/A 1.90 mm	N/A 90	N/A 5.80 mm	N/A Seal Guides
6.4x1.90B70	N/A 117891	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 70	N/A 6.40 mm	N/A Seal Guides
6.4 X 1.9 B-90	N/A 117892	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 90	N/A 6.40 mm	N/A Seal Guides
6.8x1.90B70	N/A 117893	N/A Metric Standard O-Ring	N/A Buna	N/A P7	N/A 1.90 mm	N/A 70	N/A 6.80 mm	N/A Seal Guides
6.8 X 1.9 B-90	N/A 117894	N/A Metric Standard O-Ring	N/A Buna	N/A P7	N/A 1.90 mm	N/A 90	N/A 6.80 mm	N/A Seal Guides
7.2x1.90B70	N/A 117895	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 70	N/A 7.20 mm	N/A Seal Guides
7.2 X 1.9 B-90	N/A 117896	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.90 mm	N/A 90	N/A 7.20 mm	N/A Seal Guides
7.8x1.90B70	N/A 117897	N/A Metric Standard O-Ring	N/A Buna	N/A P8	N/A 1.90 mm	N/A 70	N/A 7.80 mm	N/A Seal Guides

N/A
117873

N/A Metric Standard O-Ring

N/A Buna

N/A P3

N/A 1.90 mm

N/A 70

N/A 2.80 mm

N/A Seal Guides

2.8 X 1.9 B-90

N/A
117874

N/A Metric Standard O-Ring

N/A Buna

N/A P3

N/A 1.90 mm

N/A 90

N/A 2.80 mm

N/A Seal Guides

3.4x1.90B70

N/A
117875

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 70

N/A 3.40 mm

N/A Seal Guides

3.4 X 1.9 B-90

N/A
117876

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 90

N/A 3.40 mm

N/A Seal Guides

370 X 1.9 B-70

N/A
117877

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 70

N/A 370.00 mm

N/A Seal Guides

370 X 1.9 B-90

N/A
117878

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 90

N/A 370.00 mm

N/A Seal Guides

3.8x1.90B70

N/A
117879

N/A Metric Standard O-Ring

N/A Buna

N/A P4

N/A 1.90 mm

N/A 70

N/A 3.80 mm

N/A Seal Guides

3.8 X 1.9 B-90

N/A
117880

N/A Metric Standard O-Ring

N/A Buna

N/A P4

N/A 1.90 mm

N/A 90

N/A 3.80 mm

N/A Seal Guides

4.2x1.90B70

N/A
117881

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 70

N/A 4.20 mm

N/A Seal Guides

4.2 X 1.9 B-90

N/A
117882

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 90

N/A 4.20 mm

N/A Seal Guides

4.8x1.90B70

N/A
117883

N/A Metric Standard O-Ring

N/A Buna

N/A P5

N/A 1.90 mm

N/A 70

N/A 4.80 mm

N/A Seal Guides

4.8 X 1.9 B-90

N/A
117884

N/A Metric Standard O-Ring

N/A Buna

N/A P5

N/A 1.90 mm

N/A 90

N/A 4.80 mm

N/A Seal Guides

4.9 X 1.9 B-70

N/A
117885

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 70

N/A 4.90 mm

N/A Seal Guides

4.9 X 1.9 B-90

N/A
117886

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 90

N/A 4.90 mm

N/A Seal Guides

570 X 1.9 B-70

N/A
117887

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 70

N/A 570.00 mm

N/A Seal Guides

570 X 1.9 B-90

N/A
117888

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 90

N/A 570.00 mm

N/A Seal Guides

5.8x1.90B70

N/A
117889

N/A Metric Standard O-Ring

N/A Buna

N/A P6

N/A 1.90 mm

N/A 70

N/A 5.80 mm

N/A Seal Guides

5.8 X 1.9 B-90

N/A
117890

N/A Metric Standard O-Ring

N/A Buna

N/A P6

N/A 1.90 mm

N/A 90

N/A 5.80 mm

N/A Seal Guides

6.4x1.90B70

N/A
117891

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 70

N/A 6.40 mm

N/A Seal Guides

6.4 X 1.9 B-90

N/A
117892

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 90

N/A 6.40 mm

N/A Seal Guides

6.8x1.90B70

N/A
117893

N/A Metric Standard O-Ring

N/A Buna

N/A P7

N/A 1.90 mm

N/A 70

N/A 6.80 mm

N/A Seal Guides

6.8 X 1.9 B-90

N/A
117894

N/A Metric Standard O-Ring

N/A Buna

N/A P7

N/A 1.90 mm

N/A 90

N/A 6.80 mm

N/A Seal Guides

7.2x1.90B70

N/A
117895

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 70

N/A 7.20 mm

N/A Seal Guides

7.2 X 1.9 B-90

N/A
117896

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.90 mm

N/A 90

N/A 7.20 mm

N/A Seal Guides

7.8x1.90B70

N/A
117897

N/A Metric Standard O-Ring

N/A Buna

N/A P8

N/A 1.90 mm

N/A 70

N/A 7.80 mm

N/A Seal Guides