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
180 X 8 B-70	N/A 124961	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 180.00 mm	N/A Seal Guides
180 X 8 B-90	N/A 124962	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 180.00 mm	N/A Seal Guides
195 X 8 B-70	N/A 124963	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 195.00 mm	N/A Seal Guides
195 X 8 B-90	N/A 124964	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 195.00 mm	N/A Seal Guides
216 X 8 B-70	N/A 124965	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 216.00 mm	N/A Seal Guides
216 X 8 B-90	N/A 124966	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 216.00 mm	N/A Seal Guides
226 X 8 B-70	N/A 124967	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 226.00 mm	N/A Seal Guides
226 X 8 B-90	N/A 124968	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 226.00 mm	N/A Seal Guides
230x8.00B70	N/A 124969	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 230.00 mm	N/A Seal Guides
230 X 8 B-90	N/A 124970	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 230.00 mm	N/A Seal Guides
240 X 8 B-70	N/A 124971	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 240.00 mm	N/A Seal Guides
240 X 8 B-90	N/A 124972	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 240.00 mm	N/A Seal Guides
242 X 8 B-70	N/A 124973	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 242.00 mm	N/A Seal Guides
242 X 8 B-90	N/A 124974	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 242.00 mm	N/A Seal Guides
260x8.00B70	N/A 124975	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 260.00 mm	N/A Seal Guides
260 X 8 B-90	N/A 124976	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 260.00 mm	N/A Seal Guides
265 X 8 B-70	N/A 124977	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 265.00 mm	N/A Seal Guides
265 X 8 B-90	N/A 124978	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 265.00 mm	N/A Seal Guides
280x8.00B70	N/A 124979	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 280.00 mm	N/A Seal Guides
280 X 8 B-90	N/A 124980	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 280.00 mm	N/A Seal Guides
310 X 8 B-70	N/A 124981	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 310.00 mm	N/A Seal Guides
310 X 8 B-90	N/A 124982	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 310.00 mm	N/A Seal Guides
326 X 8 B-70	N/A 124983	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 326.00 mm	N/A Seal Guides
326 X 8 B-90	N/A 124984	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 326.00 mm	N/A Seal Guides
330 X 8 B-70	N/A 124985	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 330.00 mm	N/A Seal Guides

N/A
124961

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 180.00 mm

N/A Seal Guides

180 X 8 B-90

N/A
124962

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 180.00 mm

N/A Seal Guides

195 X 8 B-70

N/A
124963

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 195.00 mm

N/A Seal Guides

195 X 8 B-90

N/A
124964

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 195.00 mm

N/A Seal Guides

216 X 8 B-70

N/A
124965

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 216.00 mm

N/A Seal Guides

216 X 8 B-90

N/A
124966

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 216.00 mm

N/A Seal Guides

226 X 8 B-70

N/A
124967

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 226.00 mm

N/A Seal Guides

226 X 8 B-90

N/A
124968

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 226.00 mm

N/A Seal Guides

230x8.00B70

N/A
124969

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 230.00 mm

N/A Seal Guides

230 X 8 B-90

N/A
124970

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 230.00 mm

N/A Seal Guides

240 X 8 B-70

N/A
124971

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 240.00 mm

N/A Seal Guides

240 X 8 B-90

N/A
124972

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 240.00 mm

N/A Seal Guides

242 X 8 B-70

N/A
124973

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 242.00 mm

N/A Seal Guides

242 X 8 B-90

N/A
124974

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 242.00 mm

N/A Seal Guides

260x8.00B70

N/A
124975

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 260.00 mm

N/A Seal Guides

260 X 8 B-90

N/A
124976

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 260.00 mm

N/A Seal Guides

265 X 8 B-70

N/A
124977

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 265.00 mm

N/A Seal Guides

265 X 8 B-90

N/A
124978

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 265.00 mm

N/A Seal Guides

280x8.00B70

N/A
124979

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 280.00 mm

N/A Seal Guides

280 X 8 B-90

N/A
124980

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 280.00 mm

N/A Seal Guides

310 X 8 B-70

N/A
124981

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 310.00 mm

N/A Seal Guides

310 X 8 B-90

N/A
124982

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 310.00 mm

N/A Seal Guides

326 X 8 B-70

N/A
124983

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 326.00 mm

N/A Seal Guides

326 X 8 B-90

N/A
124984

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 326.00 mm

N/A Seal Guides

330 X 8 B-70

N/A
124985

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 330.00 mm

N/A Seal Guides