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
325x7.00B70	N/A 124861	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 325.00 mm	N/A Seal Guides
325 X 7 B-90	N/A 124862	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 325.00 mm	N/A Seal Guides
335x7.00B70	N/A 124863	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 335.00 mm	N/A Seal Guides
335 X 7 B-90	N/A 124864	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 335.00 mm	N/A Seal Guides
345x7.00B70	N/A 124865	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 345.00 mm	N/A Seal Guides
345 X 7 B-90	N/A 124866	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 345.00 mm	N/A Seal Guides
355x7.00B70	N/A 124867	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 355.00 mm	N/A Seal Guides
355 X 7 B-90	N/A 124868	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 355.00 mm	N/A Seal Guides
360 X 7 B-70	N/A 124869	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 360.00 mm	N/A Seal Guides
360 X 7 B-90	N/A 124870	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 360.00 mm	N/A Seal Guides
365x7.00B70	N/A 124871	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 365.00 mm	N/A Seal Guides
365 X 7 B-90	N/A 124872	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 365.00 mm	N/A Seal Guides
375x7.00B70	N/A 124873	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 375.00 mm	N/A Seal Guides
375 X 7 B-90	N/A 124874	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 375.00 mm	N/A Seal Guides
387x7.00B70	N/A 124875	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 387.00 mm	N/A Seal Guides
387 X 7 B-90	N/A 124876	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 387.00 mm	N/A Seal Guides
400x7.00B70	N/A 124877	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 400.00 mm	N/A Seal Guides
400 X 7 B-90	N/A 124878	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 400.00 mm	N/A Seal Guides
412 X 7 B-70	N/A 124879	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 412.00 mm	N/A Seal Guides
412 X 7 B-90	N/A 124880	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 412.00 mm	N/A Seal Guides
425x7.00B70	N/A 124881	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 425.00 mm	N/A Seal Guides
425 X 7 B-90	N/A 124882	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 425.00 mm	N/A Seal Guides
437x7.00B70	N/A 124883	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 437.00 mm	N/A Seal Guides
437 X 7 B-90	N/A 124884	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 437.00 mm	N/A Seal Guides
450x7.00B70	N/A 124885	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 450.00 mm	N/A Seal Guides

N/A
124861

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 325.00 mm

N/A Seal Guides

325 X 7 B-90

N/A
124862

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 325.00 mm

N/A Seal Guides

335x7.00B70

N/A
124863

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 335.00 mm

N/A Seal Guides

335 X 7 B-90

N/A
124864

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 335.00 mm

N/A Seal Guides

345x7.00B70

N/A
124865

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 345.00 mm

N/A Seal Guides

345 X 7 B-90

N/A
124866

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 345.00 mm

N/A Seal Guides

355x7.00B70

N/A
124867

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 355.00 mm

N/A Seal Guides

355 X 7 B-90

N/A
124868

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 355.00 mm

N/A Seal Guides

360 X 7 B-70

N/A
124869

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 360.00 mm

N/A Seal Guides

360 X 7 B-90

N/A
124870

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 360.00 mm

N/A Seal Guides

365x7.00B70

N/A
124871

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 365.00 mm

N/A Seal Guides

365 X 7 B-90

N/A
124872

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 365.00 mm

N/A Seal Guides

375x7.00B70

N/A
124873

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 375.00 mm

N/A Seal Guides

375 X 7 B-90

N/A
124874

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 375.00 mm

N/A Seal Guides

387x7.00B70

N/A
124875

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 387.00 mm

N/A Seal Guides

387 X 7 B-90

N/A
124876

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 387.00 mm

N/A Seal Guides

400x7.00B70

N/A
124877

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 400.00 mm

N/A Seal Guides

400 X 7 B-90

N/A
124878

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 400.00 mm

N/A Seal Guides

412 X 7 B-70

N/A
124879

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 412.00 mm

N/A Seal Guides

412 X 7 B-90

N/A
124880

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 412.00 mm

N/A Seal Guides

425x7.00B70

N/A
124881

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 425.00 mm

N/A Seal Guides

425 X 7 B-90

N/A
124882

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 425.00 mm

N/A Seal Guides

437x7.00B70

N/A
124883

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 437.00 mm

N/A Seal Guides

437 X 7 B-90

N/A
124884

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 437.00 mm

N/A Seal Guides

450x7.00B70

N/A
124885

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 450.00 mm

N/A Seal Guides