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
3.3 X 2.4 B-90	N/A 118304	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 3.30 mm
3.6x2.40B70	N/A 118305	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 3.60 mm
3.6 X 2.4 B-90	N/A 118306	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 3.60 mm
4.3x2.40B70	N/A 118307	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 4.30 mm
4.3 X 2.4 B-90	N/A 118308	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 4.30 mm
4.6x2.40B70	N/A 118309	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 4.60 mm
4.6 X 2.4 B-90	N/A 118310	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 4.60 mm
5.3x2.40B70	N/A 118311	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 5.30 mm
5.3 X 2.4 B-90	N/A 118312	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 5.30 mm
5.5 X 2.4 B-70	N/A 118313	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 5.50 mm
5.5 X 2.4 B-90	N/A 118314	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 5.50 mm
5.6x2.40B70	N/A 118315	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 5.60 mm
5.6 X 2.4 B-90	N/A 118316	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 5.60 mm
6.3x2.40B70	N/A 118317	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 6.30 mm
6.3 X 2.4 B-90	N/A 118318	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 6.30 mm
6.6x2.40B70	N/A 118319	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 6.60 mm
6.6 X 2.4 B-90	N/A 118320	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 6.60 mm
7.3x2.40B70	N/A 118321	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 7.30 mm
7.3 X 2.4 B-90	N/A 118322	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 7.30 mm
7.6x2.40B70	N/A 118323	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 7.60 mm
7.6 X 2.4 B-90	N/A 118324	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 7.60 mm
8 X 2.4 B-70	N/A 118325	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 8.00 mm
8 X 2.4 B-90	N/A 118326	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 8.00 mm
8.3x2.40B70	N/A 118327	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 8.30 mm
8.3 X 2.4 B-90	N/A 118328	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 8.30 mm

N/A
118304

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 3.30 mm

3.6x2.40B70

N/A
118305

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 3.60 mm

3.6 X 2.4 B-90

N/A
118306

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 3.60 mm

4.3x2.40B70

N/A
118307

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 4.30 mm

4.3 X 2.4 B-90

N/A
118308

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 4.30 mm

4.6x2.40B70

N/A
118309

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 4.60 mm

4.6 X 2.4 B-90

N/A
118310

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 4.60 mm

5.3x2.40B70

N/A
118311

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 5.30 mm

5.3 X 2.4 B-90

N/A
118312

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 5.30 mm

5.5 X 2.4 B-70

N/A
118313

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 5.50 mm

5.5 X 2.4 B-90

N/A
118314

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 5.50 mm

5.6x2.40B70

N/A
118315

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 5.60 mm

5.6 X 2.4 B-90

N/A
118316

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 5.60 mm

6.3x2.40B70

N/A
118317

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 6.30 mm

6.3 X 2.4 B-90

N/A
118318

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 6.30 mm

6.6x2.40B70

N/A
118319

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 6.60 mm

6.6 X 2.4 B-90

N/A
118320

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 6.60 mm

7.3x2.40B70

N/A
118321

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 7.30 mm

7.3 X 2.4 B-90

N/A
118322

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 7.30 mm

7.6x2.40B70

N/A
118323

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 7.60 mm

7.6 X 2.4 B-90

N/A
118324

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 7.60 mm

8 X 2.4 B-70

N/A
118325

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 8.00 mm

8 X 2.4 B-90

N/A
118326

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 8.00 mm

8.3x2.40B70

N/A
118327

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 8.30 mm

8.3 X 2.4 B-90

N/A
118328

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 8.30 mm