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
1.07 X 1.27 B-90	N/A 117246	N/A Metric Standard O-Ring	N/A Buna	N/A 2	N/A 1.27 mm	N/A 90	N/A 1.07 mm	N/A Seal Guides
3.25 X 1.27 B-70	N/A 117247	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.27 mm	N/A 70	N/A 3.25 mm	N/A Seal Guides
3.25 X 1.27 B-90	N/A 117248	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.27 mm	N/A 90	N/A 3.25 mm	N/A Seal Guides
3.91 X 1.27 B-70	N/A 117249	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.27 mm	N/A 70	N/A 3.91 mm	N/A Seal Guides
3.91 X 1.27 B-90	N/A 117250	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.27 mm	N/A 90	N/A 3.91 mm	N/A Seal Guides
4.47 X 1.27 B-70	N/A 117251	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.27 mm	N/A 70	N/A 4.47 mm	N/A Seal Guides
4.47 X 1.27 B-90	N/A 117252	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.27 mm	N/A 90	N/A 4.47 mm	N/A Seal Guides
2.5 X 1.3 B-70	N/A 117253	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.30 mm	N/A 70	N/A 2.50 mm	N/A Seal Guides
2.5 X 1.3 B-90	N/A 117254	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.30 mm	N/A 90	N/A 2.50 mm	N/A Seal Guides
8 X 1.3 B-70	N/A 117255	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.30 mm	N/A 70	N/A 8.00 mm	N/A Seal Guides
8 X 1.3 B-90	N/A 117256	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.30 mm	N/A 90	N/A 8.00 mm	N/A Seal Guides
10 X 1.3 B-70	N/A 117257	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.30 mm	N/A 70	N/A 10.00 mm	N/A Seal Guides
10 X 1.3 B-90	N/A 117258	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.30 mm	N/A 90	N/A 10.00 mm	N/A Seal Guides
11 X 1.3 B-70	N/A 117259	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.30 mm	N/A 70	N/A 11.00 mm	N/A Seal Guides
11 X 1.3 B-90	N/A 117260	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.30 mm	N/A 90	N/A 11.00 mm	N/A Seal Guides
13.5 X 1.3 B-70	N/A 117261	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.30 mm	N/A 70	N/A 13.50 mm	N/A Seal Guides
13.5 X 1.3 B-90	N/A 117262	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.30 mm	N/A 90	N/A 13.50 mm	N/A Seal Guides
20 X 1.3 B-70	N/A 117263	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.30 mm	N/A 70	N/A 20.00 mm	N/A Seal Guides
20 X 1.3 B-90	N/A 117264	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.30 mm	N/A 90	N/A 20.00 mm	N/A Seal Guides
4.7 X 1.42 B-70	N/A 117265	N/A Metric Standard O-Ring	N/A Buna	N/A 901	N/A 1.42 mm	N/A 70	N/A 4.70 mm	N/A Seal Guides
4.7 X 1.42 B-90	N/A 117266	N/A Metric Standard O-Ring	N/A Buna	N/A 901	N/A 1.42 mm	N/A 90	N/A 4.70 mm	N/A Seal Guides
1.6 X 1.5 B-70	N/A 117267	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 1.60 mm	N/A Seal Guides
1.6 X 1.5 B-90	N/A 117268	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 1.60 mm	N/A Seal Guides
1.85 X 1.5 B-70	N/A 117269	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 1.85 mm	N/A Seal Guides
1.85 X 1.5 B-90	N/A 117270	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 1.85 mm	N/A Seal Guides

N/A
117246

N/A Metric Standard O-Ring

N/A Buna

N/A 2

N/A 1.27 mm

N/A 90

N/A 1.07 mm

N/A Seal Guides

3.25 X 1.27 B-70

N/A
117247

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.27 mm

N/A 70

N/A 3.25 mm

N/A Seal Guides

3.25 X 1.27 B-90

N/A
117248

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.27 mm

N/A 90

N/A 3.25 mm

N/A Seal Guides

3.91 X 1.27 B-70

N/A
117249

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.27 mm

N/A 70

N/A 3.91 mm

N/A Seal Guides

3.91 X 1.27 B-90

N/A
117250

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.27 mm

N/A 90

N/A 3.91 mm

N/A Seal Guides

4.47 X 1.27 B-70

N/A
117251

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.27 mm

N/A 70

N/A 4.47 mm

N/A Seal Guides

4.47 X 1.27 B-90

N/A
117252

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.27 mm

N/A 90

N/A 4.47 mm

N/A Seal Guides

2.5 X 1.3 B-70

N/A
117253

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.30 mm

N/A 70

N/A 2.50 mm

N/A Seal Guides

2.5 X 1.3 B-90

N/A
117254

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.30 mm

N/A 90

N/A 2.50 mm

N/A Seal Guides

8 X 1.3 B-70

N/A
117255

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.30 mm

N/A 70

N/A 8.00 mm

N/A Seal Guides

8 X 1.3 B-90

N/A
117256

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.30 mm

N/A 90

N/A 8.00 mm

N/A Seal Guides

10 X 1.3 B-70

N/A
117257

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.30 mm

N/A 70

N/A 10.00 mm

N/A Seal Guides

10 X 1.3 B-90

N/A
117258

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.30 mm

N/A 90

N/A 10.00 mm

N/A Seal Guides

11 X 1.3 B-70

N/A
117259

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.30 mm

N/A 70

N/A 11.00 mm

N/A Seal Guides

11 X 1.3 B-90

N/A
117260

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.30 mm

N/A 90

N/A 11.00 mm

N/A Seal Guides

13.5 X 1.3 B-70

N/A
117261

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.30 mm

N/A 70

N/A 13.50 mm

N/A Seal Guides

13.5 X 1.3 B-90

N/A
117262

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.30 mm

N/A 90

N/A 13.50 mm

N/A Seal Guides

20 X 1.3 B-70

N/A
117263

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.30 mm

N/A 70

N/A 20.00 mm

N/A Seal Guides

20 X 1.3 B-90

N/A
117264

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.30 mm

N/A 90

N/A 20.00 mm

N/A Seal Guides

4.7 X 1.42 B-70

N/A
117265

N/A Metric Standard O-Ring

N/A Buna

N/A 901

N/A 1.42 mm

N/A 70

N/A 4.70 mm

N/A Seal Guides

4.7 X 1.42 B-90

N/A
117266

N/A Metric Standard O-Ring

N/A Buna

N/A 901

N/A 1.42 mm

N/A 90

N/A 4.70 mm

N/A Seal Guides

1.6 X 1.5 B-70

N/A
117267

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 1.60 mm

N/A Seal Guides

1.6 X 1.5 B-90

N/A
117268

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 1.60 mm

N/A Seal Guides

1.85 X 1.5 B-70

N/A
117269

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 1.85 mm

N/A Seal Guides

1.85 X 1.5 B-90

N/A
117270

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 1.85 mm

N/A Seal Guides