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
340 X 6 B-90	N/A 124484	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 340.00 mm	N/A Seal Guides
345 X 6 B-70	N/A 124485	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 345.00 mm	N/A Seal Guides
345 X 6 B-90	N/A 124486	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 345.00 mm	N/A Seal Guides
347 X 6 B-70	N/A 124487	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 347.00 mm	N/A Seal Guides
347 X 6 B-90	N/A 124488	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 347.00 mm	N/A Seal Guides
348x6.00B70	N/A 124489	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 348.00 mm	N/A Seal Guides
348 X 6 B-90	N/A 124490	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 348.00 mm	N/A Seal Guides
350x6.00B70	N/A 124491	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 350.00 mm	N/A Seal Guides
350 X 6 B-90	N/A 124492	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 350.00 mm	N/A Seal Guides
355x6.00B70	N/A 124493	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 355.00 mm	N/A Seal Guides
355 X 6 B-90	N/A 124494	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 355.00 mm	N/A Seal Guides
358 X 6 B-70	N/A 124495	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 358.00 mm	N/A Seal Guides
358 X 6 B-90	N/A 124496	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 358.00 mm	N/A Seal Guides
360x6.00B70	N/A 124497	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 360.00 mm	N/A Seal Guides
360 X 6 B-90	N/A 124498	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 360.00 mm	N/A Seal Guides
365 X 6 B-70	N/A 124499	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 365.00 mm	N/A Seal Guides
365 X 6 B-90	N/A 124500	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 365.00 mm	N/A Seal Guides
368 X 6 B-70	N/A 124501	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 368.00 mm	N/A Seal Guides
368 X 6 B-90	N/A 124502	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 368.00 mm	N/A Seal Guides
370x6.00B70	N/A 124503	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 370.00 mm	N/A Seal Guides
370 X 6 B-90	N/A 124504	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 370.00 mm	N/A Seal Guides
375 X 6 B-70	N/A 124505	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 375.00 mm	N/A Seal Guides
375 X 6 B-90	N/A 124506	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 375.00 mm	N/A Seal Guides
376x6.00B70	N/A 124507	N/A Metric Standard O-Ring	N/A Buna	N/A V380	N/A 6.00 mm	N/A 70	N/A 376.00 mm	N/A Seal Guides
376 X 6 B-90	N/A 124508	N/A Metric Standard O-Ring	N/A Buna	N/A V380	N/A 6.00 mm	N/A 90	N/A 376.00 mm	N/A Seal Guides

N/A
124484

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 340.00 mm

N/A Seal Guides

345 X 6 B-70

N/A
124485

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 345.00 mm

N/A Seal Guides

345 X 6 B-90

N/A
124486

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 345.00 mm

N/A Seal Guides

347 X 6 B-70

N/A
124487

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 347.00 mm

N/A Seal Guides

347 X 6 B-90

N/A
124488

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 347.00 mm

N/A Seal Guides

348x6.00B70

N/A
124489

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 348.00 mm

N/A Seal Guides

348 X 6 B-90

N/A
124490

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 348.00 mm

N/A Seal Guides

350x6.00B70

N/A
124491

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 350.00 mm

N/A Seal Guides

350 X 6 B-90

N/A
124492

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 350.00 mm

N/A Seal Guides

355x6.00B70

N/A
124493

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 355.00 mm

N/A Seal Guides

355 X 6 B-90

N/A
124494

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 355.00 mm

N/A Seal Guides

358 X 6 B-70

N/A
124495

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 358.00 mm

N/A Seal Guides

358 X 6 B-90

N/A
124496

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 358.00 mm

N/A Seal Guides

360x6.00B70

N/A
124497

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 360.00 mm

N/A Seal Guides

360 X 6 B-90

N/A
124498

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 360.00 mm

N/A Seal Guides

365 X 6 B-70

N/A
124499

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 365.00 mm

N/A Seal Guides

365 X 6 B-90

N/A
124500

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 365.00 mm

N/A Seal Guides

368 X 6 B-70

N/A
124501

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 368.00 mm

N/A Seal Guides

368 X 6 B-90

N/A
124502

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 368.00 mm

N/A Seal Guides

370x6.00B70

N/A
124503

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 370.00 mm

N/A Seal Guides

370 X 6 B-90

N/A
124504

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 370.00 mm

N/A Seal Guides

375 X 6 B-70

N/A
124505

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 375.00 mm

N/A Seal Guides

375 X 6 B-90

N/A
124506

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 375.00 mm

N/A Seal Guides

376x6.00B70

N/A
124507

N/A Metric Standard O-Ring

N/A Buna

N/A V380

N/A 6.00 mm

N/A 70

N/A 376.00 mm

N/A Seal Guides

376 X 6 B-90

N/A
124508

N/A Metric Standard O-Ring

N/A Buna

N/A V380

N/A 6.00 mm

N/A 90

N/A 376.00 mm

N/A Seal Guides