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
380x6.00B70	N/A 124511	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 380.00 mm	N/A Seal Guides
380 X 6 B-90	N/A 124512	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 380.00 mm	N/A Seal Guides
385 X 6 B-70	N/A 124513	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 385.00 mm	N/A Seal Guides
385 X 6 B-90	N/A 124514	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 385.00 mm	N/A Seal Guides
386 X 6 B-70	N/A 124515	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 386.00 mm	N/A Seal Guides
386 X 6 B-90	N/A 124516	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 386.00 mm	N/A Seal Guides
388 X 6 B-70	N/A 124517	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 388.00 mm	N/A Seal Guides
388 X 6 B-90	N/A 124518	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 388.00 mm	N/A Seal Guides
389 X 6 B-70	N/A 124519	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 389.00 mm	N/A Seal Guides
389 X 6 B-90	N/A 124520	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 389.00 mm	N/A Seal Guides
390x6.00B70	N/A 124521	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 390.00 mm	N/A Seal Guides
390 X 6 B-90	N/A 124522	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 390.00 mm	N/A Seal Guides
392 X 6 B-70	N/A 124523	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 392.00 mm	N/A Seal Guides
392 X 6 B-90	N/A 124524	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 392.00 mm	N/A Seal Guides
394x6.00B70	N/A 124525	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 394.00 mm	N/A Seal Guides
394 X 6 B-90	N/A 124526	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 394.00 mm	N/A Seal Guides
395x6.00B70	N/A 124527	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 395.00 mm	N/A Seal Guides
395 X 6 B-90	N/A 124528	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 395.00 mm	N/A Seal Guides
398 X 6 B-70	N/A 124529	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 398.00 mm	N/A Seal Guides
398 X 6 B-90	N/A 124530	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 398.00 mm	N/A Seal Guides
400x6.00B70	N/A 124531	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 400.00 mm	N/A Seal Guides
400 X 6 B-90	N/A 124532	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 400.00 mm	N/A Seal Guides
415x6.00B70	N/A 124533	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 415.00 mm	N/A Seal Guides
415 X 6 B-90	N/A 124534	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 415.00 mm	N/A Seal Guides
422 X 6 B-70	N/A 124535	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 422.00 mm	N/A Seal Guides

N/A
124511

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 380.00 mm

N/A Seal Guides

380 X 6 B-90

N/A
124512

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 380.00 mm

N/A Seal Guides

385 X 6 B-70

N/A
124513

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 385.00 mm

N/A Seal Guides

385 X 6 B-90

N/A
124514

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 385.00 mm

N/A Seal Guides

386 X 6 B-70

N/A
124515

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 386.00 mm

N/A Seal Guides

386 X 6 B-90

N/A
124516

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 386.00 mm

N/A Seal Guides

388 X 6 B-70

N/A
124517

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 388.00 mm

N/A Seal Guides

388 X 6 B-90

N/A
124518

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 388.00 mm

N/A Seal Guides

389 X 6 B-70

N/A
124519

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 389.00 mm

N/A Seal Guides

389 X 6 B-90

N/A
124520

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 389.00 mm

N/A Seal Guides

390x6.00B70

N/A
124521

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 390.00 mm

N/A Seal Guides

390 X 6 B-90

N/A
124522

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 390.00 mm

N/A Seal Guides

392 X 6 B-70

N/A
124523

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 392.00 mm

N/A Seal Guides

392 X 6 B-90

N/A
124524

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 392.00 mm

N/A Seal Guides

394x6.00B70

N/A
124525

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 394.00 mm

N/A Seal Guides

394 X 6 B-90

N/A
124526

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 394.00 mm

N/A Seal Guides

395x6.00B70

N/A
124527

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 395.00 mm

N/A Seal Guides

395 X 6 B-90

N/A
124528

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 395.00 mm

N/A Seal Guides

398 X 6 B-70

N/A
124529

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 398.00 mm

N/A Seal Guides

398 X 6 B-90

N/A
124530

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 398.00 mm

N/A Seal Guides

400x6.00B70

N/A
124531

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 400.00 mm

N/A Seal Guides

400 X 6 B-90

N/A
124532

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 400.00 mm

N/A Seal Guides

415x6.00B70

N/A
124533

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 415.00 mm

N/A Seal Guides

415 X 6 B-90

N/A
124534

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 415.00 mm

N/A Seal Guides

422 X 6 B-70

N/A
124535

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 422.00 mm

N/A Seal Guides