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
25.5 X 1.5 B-70	N/A 117371	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 25.50 mm	N/A Seal Guides
25.5 X 1.5 B-90	N/A 117372	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 25.50 mm	N/A Seal Guides
26 X 1.5 B-70	N/A 117373	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 26.00 mm	N/A Seal Guides
26 X 1.5 B-90	N/A 117374	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 26.00 mm	N/A Seal Guides
26.5 X 1.5 B-70	N/A 117375	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 26.50 mm	N/A Seal Guides
26.5 X 1.5 B-90	N/A 117376	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 26.50 mm	N/A Seal Guides
27 X 1.5 B-70	N/A 117377	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 27.00 mm	N/A Seal Guides
27 X 1.5 B-90	N/A 117378	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 27.00 mm	N/A Seal Guides
27.5 X 1.5 B-70	N/A 117379	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 27.50 mm	N/A Seal Guides
27.5 X 1.5 B-90	N/A 117380	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 27.50 mm	N/A Seal Guides
28 X 1.5 B-70	N/A 117381	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 28.00 mm	N/A Seal Guides
28 X 1.5 B-90	N/A 117382	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 28.00 mm	N/A Seal Guides
28.5 X 1.5 B-70	N/A 117383	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 28.50 mm	N/A Seal Guides
28.5 X 1.5 B-90	N/A 117384	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 28.50 mm	N/A Seal Guides
29 X 1.5 B-70	N/A 117385	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 29.00 mm	N/A Seal Guides
29 X 1.5 B-90	N/A 117386	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 29.00 mm	N/A Seal Guides
29.5 X 1.5 B-70	N/A 117387	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 29.50 mm	N/A Seal Guides
29.5 X 1.5 B-90	N/A 117388	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 29.50 mm	N/A Seal Guides
30 X 1.5 B-70	N/A 117389	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 30.00 mm	N/A Seal Guides
30 X 1.5 B-90	N/A 117390	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 30.00 mm	N/A Seal Guides
30.5 X 1.5 B-70	N/A 117391	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 30.50 mm	N/A Seal Guides
30.5 X 1.5 B-90	N/A 117392	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 30.50 mm	N/A Seal Guides
31 X 1.5 B-70	N/A 117393	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 31.00 mm	N/A Seal Guides
31 X 1.5 B-90	N/A 117394	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 31.00 mm	N/A Seal Guides
31.5 X 1.5 B-70	N/A 117395	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 31.50 mm	N/A Seal Guides

N/A
117371

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 25.50 mm

N/A Seal Guides

25.5 X 1.5 B-90

N/A
117372

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 25.50 mm

N/A Seal Guides

26 X 1.5 B-70

N/A
117373

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 26.00 mm

N/A Seal Guides

26 X 1.5 B-90

N/A
117374

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 26.00 mm

N/A Seal Guides

26.5 X 1.5 B-70

N/A
117375

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 26.50 mm

N/A Seal Guides

26.5 X 1.5 B-90

N/A
117376

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 26.50 mm

N/A Seal Guides

27 X 1.5 B-70

N/A
117377

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 27.00 mm

N/A Seal Guides

27 X 1.5 B-90

N/A
117378

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 27.00 mm

N/A Seal Guides

27.5 X 1.5 B-70

N/A
117379

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 27.50 mm

N/A Seal Guides

27.5 X 1.5 B-90

N/A
117380

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 27.50 mm

N/A Seal Guides

28 X 1.5 B-70

N/A
117381

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 28.00 mm

N/A Seal Guides

28 X 1.5 B-90

N/A
117382

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 28.00 mm

N/A Seal Guides

28.5 X 1.5 B-70

N/A
117383

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 28.50 mm

N/A Seal Guides

28.5 X 1.5 B-90

N/A
117384

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 28.50 mm

N/A Seal Guides

29 X 1.5 B-70

N/A
117385

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 29.00 mm

N/A Seal Guides

29 X 1.5 B-90

N/A
117386

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 29.00 mm

N/A Seal Guides

29.5 X 1.5 B-70

N/A
117387

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 29.50 mm

N/A Seal Guides

29.5 X 1.5 B-90

N/A
117388

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 29.50 mm

N/A Seal Guides

30 X 1.5 B-70

N/A
117389

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 30.00 mm

N/A Seal Guides

30 X 1.5 B-90

N/A
117390

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 30.00 mm

N/A Seal Guides

30.5 X 1.5 B-70

N/A
117391

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 30.50 mm

N/A Seal Guides

30.5 X 1.5 B-90

N/A
117392

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 30.50 mm

N/A Seal Guides

31 X 1.5 B-70

N/A
117393

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 31.00 mm

N/A Seal Guides

31 X 1.5 B-90

N/A
117394

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 31.00 mm

N/A Seal Guides

31.5 X 1.5 B-70

N/A
117395

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 31.50 mm

N/A Seal Guides