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
266 X 6 B-90	N/A 124430	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 266.00 mm	N/A Seal Guides
270x6.00B70	N/A 124431	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 270.00 mm	N/A Seal Guides
270 X 6 B-90	N/A 124432	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 270.00 mm	N/A Seal Guides
272 X 6 B-70	N/A 124433	N/A Metric Standard O-Ring	N/A Buna	N/A V275	N/A 6.00 mm	N/A 70	N/A 272.00 mm	N/A Seal Guides
272 X 6 B-90	N/A 124434	N/A Metric Standard O-Ring	N/A Buna	N/A V275	N/A 6.00 mm	N/A 90	N/A 272.00 mm	N/A Seal Guides
278 X 6 B-70	N/A 124437	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 278.00 mm	N/A Seal Guides
278 X 6 B-90	N/A 124438	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 278.00 mm	N/A Seal Guides
280x6.00B70	N/A 124439	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 280.00 mm	N/A Seal Guides
280 X 6 B-90	N/A 124440	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 280.00 mm	N/A Seal Guides
284 X 6 B-70	N/A 124441	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 284.00 mm	N/A Seal Guides
284 X 6 B-90	N/A 124442	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 284.00 mm	N/A Seal Guides
285x6.00B70	N/A 124443	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 285.00 mm	N/A Seal Guides
285 X 6 B-90	N/A 124444	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 285.00 mm	N/A Seal Guides
288 X 6 B-70	N/A 124445	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 288.00 mm	N/A Seal Guides
288 X 6 B-90	N/A 124446	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 288.00 mm	N/A Seal Guides
290 X 6 B-70	N/A 124447	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 290.00 mm	N/A Seal Guides
290 X 6 B-90	N/A 124448	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 290.00 mm	N/A Seal Guides
294x6.00B70	N/A 124449	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 294.00 mm	N/A Seal Guides
294 X 6 B-90	N/A 124450	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 294.00 mm	N/A Seal Guides
295x6.00B70	N/A 124451	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 295.00 mm	N/A Seal Guides
295 X 6 B-90	N/A 124452	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 295.00 mm	N/A Seal Guides
300x6.00B70	N/A 124453	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 300.00 mm	N/A Seal Guides
300 X 6 B-90	N/A 124454	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 300.00 mm	N/A Seal Guides
301 X 6 B-70	N/A 124455	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 301.00 mm	N/A Seal Guides
301 X 6 B-90	N/A 124456	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 301.00 mm	N/A Seal Guides

N/A
124430

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 266.00 mm

N/A Seal Guides

270x6.00B70

N/A
124431

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 270.00 mm

N/A Seal Guides

270 X 6 B-90

N/A
124432

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 270.00 mm

N/A Seal Guides

272 X 6 B-70

N/A
124433

N/A Metric Standard O-Ring

N/A Buna

N/A V275

N/A 6.00 mm

N/A 70

N/A 272.00 mm

N/A Seal Guides

272 X 6 B-90

N/A
124434

N/A Metric Standard O-Ring

N/A Buna

N/A V275

N/A 6.00 mm

N/A 90

N/A 272.00 mm

N/A Seal Guides

278 X 6 B-70

N/A
124437

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 278.00 mm

N/A Seal Guides

278 X 6 B-90

N/A
124438

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 278.00 mm

N/A Seal Guides

280x6.00B70

N/A
124439

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 280.00 mm

N/A Seal Guides

280 X 6 B-90

N/A
124440

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 280.00 mm

N/A Seal Guides

284 X 6 B-70

N/A
124441

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 284.00 mm

N/A Seal Guides

284 X 6 B-90

N/A
124442

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 284.00 mm

N/A Seal Guides

285x6.00B70

N/A
124443

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 285.00 mm

N/A Seal Guides

285 X 6 B-90

N/A
124444

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 285.00 mm

N/A Seal Guides

288 X 6 B-70

N/A
124445

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 288.00 mm

N/A Seal Guides

288 X 6 B-90

N/A
124446

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 288.00 mm

N/A Seal Guides

290 X 6 B-70

N/A
124447

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 290.00 mm

N/A Seal Guides

290 X 6 B-90

N/A
124448

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 290.00 mm

N/A Seal Guides

294x6.00B70

N/A
124449

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 294.00 mm

N/A Seal Guides

294 X 6 B-90

N/A
124450

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 294.00 mm

N/A Seal Guides

295x6.00B70

N/A
124451

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 295.00 mm

N/A Seal Guides

295 X 6 B-90

N/A
124452

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 295.00 mm

N/A Seal Guides

300x6.00B70

N/A
124453

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 300.00 mm

N/A Seal Guides

300 X 6 B-90

N/A
124454

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 300.00 mm

N/A Seal Guides

301 X 6 B-70

N/A
124455

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 301.00 mm

N/A Seal Guides

301 X 6 B-90

N/A
124456

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 301.00 mm

N/A Seal Guides