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
198 X 5 B-90	N/A 122926	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 198.00 mm	N/A Seal Guides
199 X 5 B-70	N/A 122927	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 199.00 mm	N/A Seal Guides
199 X 5 B-90	N/A 122928	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 199.00 mm	N/A Seal Guides
200x5.00B70	N/A 122929	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 200.00 mm	N/A Seal Guides
200 X 5 B-90	N/A 122930	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 200.00 mm	N/A Seal Guides
201 X 5 B-70	N/A 122931	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 201.00 mm	N/A Seal Guides
201 X 5 B-90	N/A 122932	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 201.00 mm	N/A Seal Guides
202x5.00B70	N/A 122933	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 202.00 mm	N/A Seal Guides
202 X 5 B-90	N/A 122934	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 202.00 mm	N/A Seal Guides
203 X 5 B-70	N/A 122935	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 203.00 mm	N/A Seal Guides
203 X 5 B-90	N/A 122936	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 203.00 mm	N/A Seal Guides
204 X 5 B-70	N/A 122937	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 204.00 mm	N/A Seal Guides
204 X 5 B-90	N/A 122938	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 204.00 mm	N/A Seal Guides
205x5.00B70	N/A 122939	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 205.00 mm	N/A Seal Guides
205 X 5 B-90	N/A 122940	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 205.00 mm	N/A Seal Guides
206x5.00B70	N/A 122941	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 206.00 mm	N/A Seal Guides
206 X 5 B-90	N/A 122942	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 206.00 mm	N/A Seal Guides
208x5.00B70	N/A 122943	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 208.00 mm	N/A Seal Guides
208 X 5 B-90	N/A 122944	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 208.00 mm	N/A Seal Guides
209 X 5 B-70	N/A 122945	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 209.00 mm	N/A Seal Guides
209 X 5 B-90	N/A 122946	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 209.00 mm	N/A Seal Guides
210x5.00B70	N/A 122947	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 210.00 mm	N/A Seal Guides
210 X 5 B-90	N/A 122948	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 210.00 mm	N/A Seal Guides
211 X 5 B-70	N/A 122949	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 211.00 mm	N/A Seal Guides
211 X 5 B-90	N/A 122950	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 211.00 mm	N/A Seal Guides

N/A
122926

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 198.00 mm

N/A Seal Guides

199 X 5 B-70

N/A
122927

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 199.00 mm

N/A Seal Guides

199 X 5 B-90

N/A
122928

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 199.00 mm

N/A Seal Guides

200x5.00B70

N/A
122929

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 200.00 mm

N/A Seal Guides

200 X 5 B-90

N/A
122930

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 200.00 mm

N/A Seal Guides

201 X 5 B-70

N/A
122931

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 201.00 mm

N/A Seal Guides

201 X 5 B-90

N/A
122932

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 201.00 mm

N/A Seal Guides

202x5.00B70

N/A
122933

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 202.00 mm

N/A Seal Guides

202 X 5 B-90

N/A
122934

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 202.00 mm

N/A Seal Guides

203 X 5 B-70

N/A
122935

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 203.00 mm

N/A Seal Guides

203 X 5 B-90

N/A
122936

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 203.00 mm

N/A Seal Guides

204 X 5 B-70

N/A
122937

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 204.00 mm

N/A Seal Guides

204 X 5 B-90

N/A
122938

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 204.00 mm

N/A Seal Guides

205x5.00B70

N/A
122939

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 205.00 mm

N/A Seal Guides

205 X 5 B-90

N/A
122940

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 205.00 mm

N/A Seal Guides

206x5.00B70

N/A
122941

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 206.00 mm

N/A Seal Guides

206 X 5 B-90

N/A
122942

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 206.00 mm

N/A Seal Guides

208x5.00B70

N/A
122943

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 208.00 mm

N/A Seal Guides

208 X 5 B-90

N/A
122944

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 208.00 mm

N/A Seal Guides

209 X 5 B-70

N/A
122945

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 209.00 mm

N/A Seal Guides

209 X 5 B-90

N/A
122946

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 209.00 mm

N/A Seal Guides

210x5.00B70

N/A
122947

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 210.00 mm

N/A Seal Guides

210 X 5 B-90

N/A
122948

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 210.00 mm

N/A Seal Guides

211 X 5 B-70

N/A
122949

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 211.00 mm

N/A Seal Guides

211 X 5 B-90

N/A
122950

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 211.00 mm

N/A Seal Guides