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
156 X 6 B-70	N/A 124303	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 156.00 mm	N/A Seal Guides
156 X 6 B-90	N/A 124304	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 156.00 mm	N/A Seal Guides
157x6.00B70	N/A 124305	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 157.00 mm	N/A Seal Guides
157 X 6 B-90	N/A 124306	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 157.00 mm	N/A Seal Guides
158x6.00B70	N/A 124307	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 158.00 mm	N/A Seal Guides
158 X 6 B-90	N/A 124308	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 158.00 mm	N/A Seal Guides
159x6.00B70	N/A 124309	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 159.00 mm	N/A Seal Guides
159 X 6 B-90	N/A 124310	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 159.00 mm	N/A Seal Guides
160x6.00B70	N/A 124311	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 160.00 mm	N/A Seal Guides
160 X 6 B-90	N/A 124312	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 160.00 mm	N/A Seal Guides
162x6.00B70	N/A 124313	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 162.00 mm	N/A Seal Guides
162 X 6 B-90	N/A 124314	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 162.00 mm	N/A Seal Guides
165x6.00B70	N/A 124315	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 165.00 mm	N/A Seal Guides
165 X 6 B-90	N/A 124316	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 165.00 mm	N/A Seal Guides
166x6.00B70	N/A 124317	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 166.00 mm	N/A Seal Guides
166 X 6 B-90	N/A 124318	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 166.00 mm	N/A Seal Guides
169 X 6 B-70	N/A 124319	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 169.00 mm	N/A Seal Guides
169 X 6 B-90	N/A 124320	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 169.00 mm	N/A Seal Guides
170x6.00B70	N/A 124321	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 170.00 mm	N/A Seal Guides
170 X 6 B-90	N/A 124322	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 170.00 mm	N/A Seal Guides
172x6.00B70	N/A 124323	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 172.00 mm	N/A Seal Guides
172 X 6 B-90	N/A 124324	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 172.00 mm	N/A Seal Guides
175x6.00B70	N/A 124325	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 175.00 mm	N/A Seal Guides
175 X 6 B-90	N/A 124326	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 175.00 mm	N/A Seal Guides
176 X 6 B-70	N/A 124327	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 176.00 mm	N/A Seal Guides

N/A
124303

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 156.00 mm

N/A Seal Guides

156 X 6 B-90

N/A
124304

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 156.00 mm

N/A Seal Guides

157x6.00B70

N/A
124305

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 157.00 mm

N/A Seal Guides

157 X 6 B-90

N/A
124306

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 157.00 mm

N/A Seal Guides

158x6.00B70

N/A
124307

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 158.00 mm

N/A Seal Guides

158 X 6 B-90

N/A
124308

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 158.00 mm

N/A Seal Guides

159x6.00B70

N/A
124309

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 159.00 mm

N/A Seal Guides

159 X 6 B-90

N/A
124310

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 159.00 mm

N/A Seal Guides

160x6.00B70

N/A
124311

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 160.00 mm

N/A Seal Guides

160 X 6 B-90

N/A
124312

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 160.00 mm

N/A Seal Guides

162x6.00B70

N/A
124313

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 162.00 mm

N/A Seal Guides

162 X 6 B-90

N/A
124314

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 162.00 mm

N/A Seal Guides

165x6.00B70

N/A
124315

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 165.00 mm

N/A Seal Guides

165 X 6 B-90

N/A
124316

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 165.00 mm

N/A Seal Guides

166x6.00B70

N/A
124317

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 166.00 mm

N/A Seal Guides

166 X 6 B-90

N/A
124318

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 166.00 mm

N/A Seal Guides

169 X 6 B-70

N/A
124319

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 169.00 mm

N/A Seal Guides

169 X 6 B-90

N/A
124320

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 169.00 mm

N/A Seal Guides

170x6.00B70

N/A
124321

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 170.00 mm

N/A Seal Guides

170 X 6 B-90

N/A
124322

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 170.00 mm

N/A Seal Guides

172x6.00B70

N/A
124323

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 172.00 mm

N/A Seal Guides

172 X 6 B-90

N/A
124324

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 172.00 mm

N/A Seal Guides

175x6.00B70

N/A
124325

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 175.00 mm

N/A Seal Guides

175 X 6 B-90

N/A
124326

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 175.00 mm

N/A Seal Guides

176 X 6 B-70

N/A
124327

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 176.00 mm

N/A Seal Guides