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
11x5.00B70	N/A 122551	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 11.00 mm	N/A Seal Guides
11 X 5 B-90	N/A 122552	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 11.00 mm	N/A Seal Guides
12x5.00B70	N/A 122553	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 12.00 mm	N/A Seal Guides
12 X 5 B-90	N/A 122554	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 12.00 mm	N/A Seal Guides
13x5.00B70	N/A 122555	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 13.00 mm	N/A Seal Guides
13 X 5 B-90	N/A 122556	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 13.00 mm	N/A Seal Guides
14x5.00B70	N/A 122557	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 14.00 mm	N/A Seal Guides
14 X 5 B-90	N/A 122558	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 14.00 mm	N/A Seal Guides
15x5.00B70	N/A 122559	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 15.00 mm	N/A Seal Guides
15 X 5 B-90	N/A 122560	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 15.00 mm	N/A Seal Guides
16x5.00B70	N/A 122561	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 16.00 mm	N/A Seal Guides
16 X 5 B-90	N/A 122562	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 16.00 mm	N/A Seal Guides
17x5.00B70	N/A 122563	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 17.00 mm	N/A Seal Guides
17 X 5 B-90	N/A 122564	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 17.00 mm	N/A Seal Guides
18x5.00B70	N/A 122565	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 18.00 mm	N/A Seal Guides
18 X 5 B-90	N/A 122566	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 18.00 mm	N/A Seal Guides
19x5.00B70	N/A 122567	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 19.00 mm	N/A Seal Guides
19 X 5 B-90	N/A 122568	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 19.00 mm	N/A Seal Guides
20x5.00B70	N/A 122569	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 20.00 mm	N/A Seal Guides
20 X 5 B-90	N/A 122570	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 20.00 mm	N/A Seal Guides
21x5.00B70	N/A 122571	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 21.00 mm	N/A Seal Guides
21 X 5 B-90	N/A 122572	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 21.00 mm	N/A Seal Guides
22x5.00B70	N/A 122573	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 22.00 mm	N/A Seal Guides
22 X 5 B-90	N/A 122574	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 22.00 mm	N/A Seal Guides
23x5.00B70	N/A 122575	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 23.00 mm	N/A Seal Guides

N/A
122551

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 11.00 mm

N/A Seal Guides

11 X 5 B-90

N/A
122552

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 11.00 mm

N/A Seal Guides

12x5.00B70

N/A
122553

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 12.00 mm

N/A Seal Guides

12 X 5 B-90

N/A
122554

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 12.00 mm

N/A Seal Guides

13x5.00B70

N/A
122555

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 13.00 mm

N/A Seal Guides

13 X 5 B-90

N/A
122556

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 13.00 mm

N/A Seal Guides

14x5.00B70

N/A
122557

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 14.00 mm

N/A Seal Guides

14 X 5 B-90

N/A
122558

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 14.00 mm

N/A Seal Guides

15x5.00B70

N/A
122559

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 15.00 mm

N/A Seal Guides

15 X 5 B-90

N/A
122560

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 15.00 mm

N/A Seal Guides

16x5.00B70

N/A
122561

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 16.00 mm

N/A Seal Guides

16 X 5 B-90

N/A
122562

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 16.00 mm

N/A Seal Guides

17x5.00B70

N/A
122563

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 17.00 mm

N/A Seal Guides

17 X 5 B-90

N/A
122564

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 17.00 mm

N/A Seal Guides

18x5.00B70

N/A
122565

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 18.00 mm

N/A Seal Guides

18 X 5 B-90

N/A
122566

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 18.00 mm

N/A Seal Guides

19x5.00B70

N/A
122567

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 19.00 mm

N/A Seal Guides

19 X 5 B-90

N/A
122568

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 19.00 mm

N/A Seal Guides

20x5.00B70

N/A
122569

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 20.00 mm

N/A Seal Guides

20 X 5 B-90

N/A
122570

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 20.00 mm

N/A Seal Guides

21x5.00B70

N/A
122571

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 21.00 mm

N/A Seal Guides

21 X 5 B-90

N/A
122572

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 21.00 mm

N/A Seal Guides

22x5.00B70

N/A
122573

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 22.00 mm

N/A Seal Guides

22 X 5 B-90

N/A
122574

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 22.00 mm

N/A Seal Guides

23x5.00B70

N/A
122575

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 23.00 mm

N/A Seal Guides