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
230 X 7 B-90	N/A 124836	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 230.00 mm	N/A Seal Guides
236x7.00B70	N/A 124837	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 236.00 mm	N/A Seal Guides
236 X 7 B-90	N/A 124838	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 236.00 mm	N/A Seal Guides
243x7.00B70	N/A 124839	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 243.00 mm	N/A Seal Guides
243 X 7 B-90	N/A 124840	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 243.00 mm	N/A Seal Guides
250x7.00B70	N/A 124841	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 250.00 mm	N/A Seal Guides
250 X 7 B-90	N/A 124842	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 250.00 mm	N/A Seal Guides
250.37 X 7 B-70	N/A 124843	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 250.37 mm	N/A Seal Guides
250.37 X 7 B-90	N/A 124844	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 250.37 mm	N/A Seal Guides
258x7.00B70	N/A 124845	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 258.00 mm	N/A Seal Guides
258 X 7 B-90	N/A 124846	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 258.00 mm	N/A Seal Guides
265x7.00B70	N/A 124847	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 265.00 mm	N/A Seal Guides
265 X 7 B-90	N/A 124848	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 265.00 mm	N/A Seal Guides
272x7.00B70	N/A 124849	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 272.00 mm	N/A Seal Guides
272 X 7 B-90	N/A 124850	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 272.00 mm	N/A Seal Guides
280 X 7 B-70	N/A 124851	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 280.00 mm	N/A Seal Guides
280 X 7 B-90	N/A 124852	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 280.00 mm	N/A Seal Guides
290 X 7 B-70	N/A 124853	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 290.00 mm	N/A Seal Guides
290 X 7 B-90	N/A 124854	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 290.00 mm	N/A Seal Guides
300x7.00B70	N/A 124855	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 300.00 mm	N/A Seal Guides
300 X 7 B-90	N/A 124856	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 300.00 mm	N/A Seal Guides
307 X 7 B-70	N/A 124857	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 307.00 mm	N/A Seal Guides
307 X 7 B-90	N/A 124858	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 307.00 mm	N/A Seal Guides
315x7.00B70	N/A 124859	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 315.00 mm	N/A Seal Guides
315 X 7 B-90	N/A 124860	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 315.00 mm	N/A Seal Guides

N/A
124836

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 230.00 mm

N/A Seal Guides

236x7.00B70

N/A
124837

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 236.00 mm

N/A Seal Guides

236 X 7 B-90

N/A
124838

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 236.00 mm

N/A Seal Guides

243x7.00B70

N/A
124839

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 243.00 mm

N/A Seal Guides

243 X 7 B-90

N/A
124840

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 243.00 mm

N/A Seal Guides

250x7.00B70

N/A
124841

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 250.00 mm

N/A Seal Guides

250 X 7 B-90

N/A
124842

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 250.00 mm

N/A Seal Guides

250.37 X 7 B-70

N/A
124843

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 250.37 mm

N/A Seal Guides

250.37 X 7 B-90

N/A
124844

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 250.37 mm

N/A Seal Guides

258x7.00B70

N/A
124845

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 258.00 mm

N/A Seal Guides

258 X 7 B-90

N/A
124846

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 258.00 mm

N/A Seal Guides

265x7.00B70

N/A
124847

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 265.00 mm

N/A Seal Guides

265 X 7 B-90

N/A
124848

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 265.00 mm

N/A Seal Guides

272x7.00B70

N/A
124849

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 272.00 mm

N/A Seal Guides

272 X 7 B-90

N/A
124850

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 272.00 mm

N/A Seal Guides

280 X 7 B-70

N/A
124851

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 280.00 mm

N/A Seal Guides

280 X 7 B-90

N/A
124852

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 280.00 mm

N/A Seal Guides

290 X 7 B-70

N/A
124853

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 290.00 mm

N/A Seal Guides

290 X 7 B-90

N/A
124854

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 290.00 mm

N/A Seal Guides

300x7.00B70

N/A
124855

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 300.00 mm

N/A Seal Guides

300 X 7 B-90

N/A
124856

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 300.00 mm

N/A Seal Guides

307 X 7 B-70

N/A
124857

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 307.00 mm

N/A Seal Guides

307 X 7 B-90

N/A
124858

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 307.00 mm

N/A Seal Guides

315x7.00B70

N/A
124859

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 315.00 mm

N/A Seal Guides

315 X 7 B-90

N/A
124860

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 315.00 mm

N/A Seal Guides