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
201 X 6 B-70	N/A 124353	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 201.00 mm	N/A Seal Guides
201 X 6 B-90	N/A 124354	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 201.00 mm	N/A Seal Guides
202 X 6 B-70	N/A 124355	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 202.00 mm	N/A Seal Guides
202 X 6 B-90	N/A 124356	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 202.00 mm	N/A Seal Guides
203 X 6 B-70	N/A 124357	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 203.00 mm	N/A Seal Guides
203 X 6 B-90	N/A 124358	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 203.00 mm	N/A Seal Guides
203.5 X 6 B-70	N/A 124359	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 203.50 mm	N/A Seal Guides
203.5 X 6 B-90	N/A 124360	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 203.50 mm	N/A Seal Guides
204 X 6 B-70	N/A 124361	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 204.00 mm	N/A Seal Guides
204 X 6 B-90	N/A 124362	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 204.00 mm	N/A Seal Guides
205x6.00B70	N/A 124363	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 205.00 mm	N/A Seal Guides
205 X 6 B-90	N/A 124364	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 205.00 mm	N/A Seal Guides
206 X 6 B-70	N/A 124365	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 206.00 mm	N/A Seal Guides
206 X 6 B-90	N/A 124366	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 206.00 mm	N/A Seal Guides
208x6.00B70	N/A 124367	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 208.00 mm	N/A Seal Guides
208 X 6 B-90	N/A 124368	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 208.00 mm	N/A Seal Guides
210x6.00B70	N/A 124369	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 210.00 mm	N/A Seal Guides
210 X 6 B-90	N/A 124370	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 210.00 mm	N/A Seal Guides
212x6.00B70	N/A 124371	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 212.00 mm	N/A Seal Guides
212 X 6 B-90	N/A 124372	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 212.00 mm	N/A Seal Guides
215x6.00B70	N/A 124373	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 215.00 mm	N/A Seal Guides
215 X 6 B-90	N/A 124374	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 215.00 mm	N/A Seal Guides
216 X 6 B-70	N/A 124375	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 216.00 mm	N/A Seal Guides
216 X 6 B-90	N/A 124376	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 216.00 mm	N/A Seal Guides
217 X 6 B-70	N/A 124377	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 217.00 mm	N/A Seal Guides

N/A
124353

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 201.00 mm

N/A Seal Guides

201 X 6 B-90

N/A
124354

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 201.00 mm

N/A Seal Guides

202 X 6 B-70

N/A
124355

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 202.00 mm

N/A Seal Guides

202 X 6 B-90

N/A
124356

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 202.00 mm

N/A Seal Guides

203 X 6 B-70

N/A
124357

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 203.00 mm

N/A Seal Guides

203 X 6 B-90

N/A
124358

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 203.00 mm

N/A Seal Guides

203.5 X 6 B-70

N/A
124359

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 203.50 mm

N/A Seal Guides

203.5 X 6 B-90

N/A
124360

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 203.50 mm

N/A Seal Guides

204 X 6 B-70

N/A
124361

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 204.00 mm

N/A Seal Guides

204 X 6 B-90

N/A
124362

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 204.00 mm

N/A Seal Guides

205x6.00B70

N/A
124363

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 205.00 mm

N/A Seal Guides

205 X 6 B-90

N/A
124364

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 205.00 mm

N/A Seal Guides

206 X 6 B-70

N/A
124365

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 206.00 mm

N/A Seal Guides

206 X 6 B-90

N/A
124366

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 206.00 mm

N/A Seal Guides

208x6.00B70

N/A
124367

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 208.00 mm

N/A Seal Guides

208 X 6 B-90

N/A
124368

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 208.00 mm

N/A Seal Guides

210x6.00B70

N/A
124369

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 210.00 mm

N/A Seal Guides

210 X 6 B-90

N/A
124370

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 210.00 mm

N/A Seal Guides

212x6.00B70

N/A
124371

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 212.00 mm

N/A Seal Guides

212 X 6 B-90

N/A
124372

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 212.00 mm

N/A Seal Guides

215x6.00B70

N/A
124373

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 215.00 mm

N/A Seal Guides

215 X 6 B-90

N/A
124374

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 215.00 mm

N/A Seal Guides

216 X 6 B-70

N/A
124375

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 216.00 mm

N/A Seal Guides

216 X 6 B-90

N/A
124376

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 216.00 mm

N/A Seal Guides

217 X 6 B-70

N/A
124377

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 217.00 mm

N/A Seal Guides