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
219.5 X 3.2 B-90	N/A 119918	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.20 mm	N/A 90	N/A 219.50 mm
227 X 3.2 B-70	N/A 119919	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.20 mm	N/A 70	N/A 227.00 mm
227 X 3.2 B-90	N/A 119920	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.20 mm	N/A 90	N/A 227.00 mm
5x3.50B70	N/A 119921	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 5.00 mm
5 X 3.5 B-90	N/A 119922	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 5.00 mm
8x3.50B70	N/A 119923	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 8.00 mm
8 X 3.5 B-90	N/A 119924	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 8.00 mm
9x3.50B70	N/A 119925	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 9.00 mm
9 X 3.5 B-90	N/A 119926	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 9.00 mm
9.2 X 3.5 B-70	N/A 119927	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 9.20 mm
9.2 X 3.5 B-90	N/A 119928	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 9.20 mm
10x3.50B70	N/A 119929	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 10.00 mm
10 X 3.5 B-90	N/A 119930	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 10.00 mm
11x3.50B70	N/A 119931	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 11.00 mm
11 X 3.5 B-90	N/A 119932	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 11.00 mm
12x3.50B70	N/A 119933	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 12.00 mm
12 X 3.5 B-90	N/A 119934	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 12.00 mm
13x3.50B70	N/A 119935	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 13.00 mm
13 X 3.5 B-90	N/A 119936	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 13.00 mm
14x3.50B70	N/A 119937	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 14.00 mm
14 X 3.5 B-90	N/A 119938	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 14.00 mm
15x3.50B70	N/A 119939	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 15.00 mm
15 X 3.5 B-90	N/A 119940	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 15.00 mm
16x3.50B70	N/A 119941	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 16.00 mm
16 X 3.5 B-90	N/A 119942	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 16.00 mm

N/A
119918

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.20 mm

N/A 90

N/A 219.50 mm

227 X 3.2 B-70

N/A
119919

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.20 mm

N/A 70

N/A 227.00 mm

227 X 3.2 B-90

N/A
119920

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.20 mm

N/A 90

N/A 227.00 mm

5x3.50B70

N/A
119921

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 5.00 mm

5 X 3.5 B-90

N/A
119922

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 5.00 mm

8x3.50B70

N/A
119923

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 8.00 mm

8 X 3.5 B-90

N/A
119924

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 8.00 mm

9x3.50B70

N/A
119925

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 9.00 mm

9 X 3.5 B-90

N/A
119926

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 9.00 mm

9.2 X 3.5 B-70

N/A
119927

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 9.20 mm

9.2 X 3.5 B-90

N/A
119928

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 9.20 mm

10x3.50B70

N/A
119929

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 10.00 mm

10 X 3.5 B-90

N/A
119930

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 10.00 mm

11x3.50B70

N/A
119931

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 11.00 mm

11 X 3.5 B-90

N/A
119932

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 11.00 mm

12x3.50B70

N/A
119933

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 12.00 mm

12 X 3.5 B-90

N/A
119934

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 12.00 mm

13x3.50B70

N/A
119935

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 13.00 mm

13 X 3.5 B-90

N/A
119936

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 13.00 mm

14x3.50B70

N/A
119937

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 14.00 mm

14 X 3.5 B-90

N/A
119938

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 14.00 mm

15x3.50B70

N/A
119939

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 15.00 mm

15 X 3.5 B-90

N/A
119940

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 15.00 mm

16x3.50B70

N/A
119941

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 16.00 mm

16 X 3.5 B-90

N/A
119942

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 16.00 mm