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
305x6.00B70	N/A 124457	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 305.00 mm	N/A Seal Guides
305 X 6 B-90	N/A 124458	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 305.00 mm	N/A Seal Guides
310x6.00B70	N/A 124459	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 310.00 mm	N/A Seal Guides
310 X 6 B-90	N/A 124460	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 310.00 mm	N/A Seal Guides
311 X 6 B-70	N/A 124461	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 311.00 mm	N/A Seal Guides
311 X 6 B-90	N/A 124462	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 311.00 mm	N/A Seal Guides
315 X 6 B-70	N/A 124463	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 315.00 mm	N/A Seal Guides
315 X 6 B-90	N/A 124464	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 315.00 mm	N/A Seal Guides
320x6.00B70	N/A 124465	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 320.00 mm	N/A Seal Guides
320 X 6 B-90	N/A 124466	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 320.00 mm	N/A Seal Guides
321.5 X 6 B-70	N/A 124467	N/A Metric Standard O-Ring	N/A Buna	N/A V325	N/A 6.00 mm	N/A 70	N/A 321.50 mm	N/A Seal Guides
321.5 X 6 B-90	N/A 124468	N/A Metric Standard O-Ring	N/A Buna	N/A V325	N/A 6.00 mm	N/A 90	N/A 321.50 mm	N/A Seal Guides
324 X 6 B-70	N/A 124471	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 324.00 mm	N/A Seal Guides
324 X 6 B-90	N/A 124472	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 324.00 mm	N/A Seal Guides
325 X 6 B-70	N/A 124473	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 325.00 mm	N/A Seal Guides
325 X 6 B-90	N/A 124474	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 325.00 mm	N/A Seal Guides
330x6.00B70	N/A 124475	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 330.00 mm	N/A Seal Guides
330 X 6 B-90	N/A 124476	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 330.00 mm	N/A Seal Guides
333 X 6 B-70	N/A 124477	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 333.00 mm	N/A Seal Guides
333 X 6 B-90	N/A 124478	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 333.00 mm	N/A Seal Guides
335x6.00B70	N/A 124479	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 335.00 mm	N/A Seal Guides
335 X 6 B-90	N/A 124480	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 335.00 mm	N/A Seal Guides
338x6.00B70	N/A 124481	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 338.00 mm	N/A Seal Guides
338 X 6 B-90	N/A 124482	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 338.00 mm	N/A Seal Guides
340x6.00B70	N/A 124483	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 340.00 mm	N/A Seal Guides

N/A
124457

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 305.00 mm

N/A Seal Guides

305 X 6 B-90

N/A
124458

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 305.00 mm

N/A Seal Guides

310x6.00B70

N/A
124459

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 310.00 mm

N/A Seal Guides

310 X 6 B-90

N/A
124460

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 310.00 mm

N/A Seal Guides

311 X 6 B-70

N/A
124461

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 311.00 mm

N/A Seal Guides

311 X 6 B-90

N/A
124462

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 311.00 mm

N/A Seal Guides

315 X 6 B-70

N/A
124463

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 315.00 mm

N/A Seal Guides

315 X 6 B-90

N/A
124464

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 315.00 mm

N/A Seal Guides

320x6.00B70

N/A
124465

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 320.00 mm

N/A Seal Guides

320 X 6 B-90

N/A
124466

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 320.00 mm

N/A Seal Guides

321.5 X 6 B-70

N/A
124467

N/A Metric Standard O-Ring

N/A Buna

N/A V325

N/A 6.00 mm

N/A 70

N/A 321.50 mm

N/A Seal Guides

321.5 X 6 B-90

N/A
124468

N/A Metric Standard O-Ring

N/A Buna

N/A V325

N/A 6.00 mm

N/A 90

N/A 321.50 mm

N/A Seal Guides

324 X 6 B-70

N/A
124471

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 324.00 mm

N/A Seal Guides

324 X 6 B-90

N/A
124472

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 324.00 mm

N/A Seal Guides

325 X 6 B-70

N/A
124473

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 325.00 mm

N/A Seal Guides

325 X 6 B-90

N/A
124474

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 325.00 mm

N/A Seal Guides

330x6.00B70

N/A
124475

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 330.00 mm

N/A Seal Guides

330 X 6 B-90

N/A
124476

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 330.00 mm

N/A Seal Guides

333 X 6 B-70

N/A
124477

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 333.00 mm

N/A Seal Guides

333 X 6 B-90

N/A
124478

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 333.00 mm

N/A Seal Guides

335x6.00B70

N/A
124479

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 335.00 mm

N/A Seal Guides

335 X 6 B-90

N/A
124480

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 335.00 mm

N/A Seal Guides

338x6.00B70

N/A
124481

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 338.00 mm

N/A Seal Guides

338 X 6 B-90

N/A
124482

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 338.00 mm

N/A Seal Guides

340x6.00B70

N/A
124483

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 340.00 mm

N/A Seal Guides