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
217 X 6 B-90	N/A 124378	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 217.00 mm	N/A Seal Guides
218 X 6 B-70	N/A 124379	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 218.00 mm	N/A Seal Guides
218 X 6 B-90	N/A 124380	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 218.00 mm	N/A Seal Guides
220x6.00B70	N/A 124381	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 220.00 mm	N/A Seal Guides
220 X 6 B-90	N/A 124382	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 220.00 mm	N/A Seal Guides
221 X 6 B-70	N/A 124383	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 221.00 mm	N/A Seal Guides
221 X 6 B-90	N/A 124384	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 221.00 mm	N/A Seal Guides
222.5 X 6 B-70	N/A 124385	N/A Metric Standard O-Ring	N/A Buna	N/A V225	N/A 6.00 mm	N/A 70	N/A 222.50 mm	N/A Seal Guides
222.5 X 6 B-90	N/A 124386	N/A Metric Standard O-Ring	N/A Buna	N/A V225	N/A 6.00 mm	N/A 90	N/A 222.50 mm	N/A Seal Guides
225x6.00B70	N/A 124389	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 225.00 mm	N/A Seal Guides
225 X 6 B-90	N/A 124390	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 225.00 mm	N/A Seal Guides
226 X 6 B-70	N/A 124391	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 226.00 mm	N/A Seal Guides
226 X 6 B-90	N/A 124392	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 226.00 mm	N/A Seal Guides
229 X 6 B-70	N/A 124393	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 229.00 mm	N/A Seal Guides
229 X 6 B-90	N/A 124394	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 229.00 mm	N/A Seal Guides
230x6.00B70	N/A 124395	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 230.00 mm	N/A Seal Guides
230 X 6 B-90	N/A 124396	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 230.00 mm	N/A Seal Guides
235 X 6 B-70	N/A 124397	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 235.00 mm	N/A Seal Guides
235 X 6 B-90	N/A 124398	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 235.00 mm	N/A Seal Guides
236 X 6 B-70	N/A 124399	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 236.00 mm	N/A Seal Guides
236 X 6 B-90	N/A 124400	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 236.00 mm	N/A Seal Guides
237 X 6 B-70	N/A 124401	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 237.00 mm	N/A Seal Guides
237 X 6 B-90	N/A 124402	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 237.00 mm	N/A Seal Guides
237.5 X 6 B-70	N/A 124403	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 237.50 mm	N/A Seal Guides
237.5 X 6 B-90	N/A 124404	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 237.50 mm	N/A Seal Guides

N/A
124378

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 217.00 mm

N/A Seal Guides

218 X 6 B-70

N/A
124379

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 218.00 mm

N/A Seal Guides

218 X 6 B-90

N/A
124380

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 218.00 mm

N/A Seal Guides

220x6.00B70

N/A
124381

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 220.00 mm

N/A Seal Guides

220 X 6 B-90

N/A
124382

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 220.00 mm

N/A Seal Guides

221 X 6 B-70

N/A
124383

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 221.00 mm

N/A Seal Guides

221 X 6 B-90

N/A
124384

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 221.00 mm

N/A Seal Guides

222.5 X 6 B-70

N/A
124385

N/A Metric Standard O-Ring

N/A Buna

N/A V225

N/A 6.00 mm

N/A 70

N/A 222.50 mm

N/A Seal Guides

222.5 X 6 B-90

N/A
124386

N/A Metric Standard O-Ring

N/A Buna

N/A V225

N/A 6.00 mm

N/A 90

N/A 222.50 mm

N/A Seal Guides

225x6.00B70

N/A
124389

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 225.00 mm

N/A Seal Guides

225 X 6 B-90

N/A
124390

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 225.00 mm

N/A Seal Guides

226 X 6 B-70

N/A
124391

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 226.00 mm

N/A Seal Guides

226 X 6 B-90

N/A
124392

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 226.00 mm

N/A Seal Guides

229 X 6 B-70

N/A
124393

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 229.00 mm

N/A Seal Guides

229 X 6 B-90

N/A
124394

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 229.00 mm

N/A Seal Guides

230x6.00B70

N/A
124395

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 230.00 mm

N/A Seal Guides

230 X 6 B-90

N/A
124396

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 230.00 mm

N/A Seal Guides

235 X 6 B-70

N/A
124397

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 235.00 mm

N/A Seal Guides

235 X 6 B-90

N/A
124398

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 235.00 mm

N/A Seal Guides

236 X 6 B-70

N/A
124399

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 236.00 mm

N/A Seal Guides

236 X 6 B-90

N/A
124400

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 236.00 mm

N/A Seal Guides

237 X 6 B-70

N/A
124401

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 237.00 mm

N/A Seal Guides

237 X 6 B-90

N/A
124402

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 237.00 mm

N/A Seal Guides

237.5 X 6 B-70

N/A
124403

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 237.50 mm

N/A Seal Guides

237.5 X 6 B-90

N/A
124404

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 237.50 mm

N/A Seal Guides