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 | 
                                                        
|---|---|---|---|---|---|---|---|---|
| 141 X 2.5 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118831  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 70 | Inside Diameter N/A 141.00 mm | Product Guides N/A Seal Guides | 
| 141 X 2.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118832  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 90 | Inside Diameter N/A 141.00 mm | Product Guides N/A Seal Guides | 
| 142x2.50B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118833  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 70 | Inside Diameter N/A 142.00 mm | Product Guides N/A Seal Guides | 
| 142 X 2.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118834  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 90 | Inside Diameter N/A 142.00 mm | Product Guides N/A Seal Guides | 
| 143 X 2.5 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118835  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 70 | Inside Diameter N/A 143.00 mm | Product Guides N/A Seal Guides | 
| 143 X 2.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118836  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 90 | Inside Diameter N/A 143.00 mm | Product Guides N/A Seal Guides | 
| 144x2.50B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118837  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 70 | Inside Diameter N/A 144.00 mm | Product Guides N/A Seal Guides | 
| 144 X 2.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118838  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 90 | Inside Diameter N/A 144.00 mm | Product Guides N/A Seal Guides | 
| 145x2.50B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118839  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 70 | Inside Diameter N/A 145.00 mm | Product Guides N/A Seal Guides | 
| 145 X 2.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118840  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 90 | Inside Diameter N/A 145.00 mm | Product Guides N/A Seal Guides | 
| 146x2.50B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118841  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 70 | Inside Diameter N/A 146.00 mm | Product Guides N/A Seal Guides | 
| 146 X 2.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118842  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 90 | Inside Diameter N/A 146.00 mm | Product Guides N/A Seal Guides | 
| 147x2.50B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118843  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 70 | Inside Diameter N/A 147.00 mm | Product Guides N/A Seal Guides | 
| 147 X 2.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118844  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 90 | Inside Diameter N/A 147.00 mm | Product Guides N/A Seal Guides | 
| 148x2.50B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118845  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 70 | Inside Diameter N/A 148.00 mm | Product Guides N/A Seal Guides | 
| 148 X 2.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118846  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 90 | Inside Diameter N/A 148.00 mm | Product Guides N/A Seal Guides | 
| 149x2.50B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118847  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 70 | Inside Diameter N/A 149.00 mm | Product Guides N/A Seal Guides | 
| 149 X 2.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118848  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 90 | Inside Diameter N/A 149.00 mm | Product Guides N/A Seal Guides | 
| 150x2.50B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118849  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 70 | Inside Diameter N/A 150.00 mm | Product Guides N/A Seal Guides | 
| 150 X 2.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118850  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.50 mm | Durometer N/A 90 | Inside Diameter N/A 150.00 mm | Product Guides N/A Seal Guides | 
| 29.1 X 2.55 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118851  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.55 mm | Durometer N/A 70 | Inside Diameter N/A 29.10 mm | Product Guides N/A Seal Guides | 
| 29.1 X 2.55 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118852  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 2.55 mm | Durometer N/A 90 | Inside Diameter N/A 29.10 mm | Product Guides N/A Seal Guides | 
| 1.24 X 2.62 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118853  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 102 | Cross Section Width N/A 2.62 mm | Durometer N/A 70 | Inside Diameter N/A 1.24 mm | Product Guides N/A Seal Guides | 
| 1.24 X 2.62 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118854  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 102 | Cross Section Width N/A 2.62 mm | Durometer N/A 90 | Inside Diameter N/A 1.24 mm | Product Guides N/A Seal Guides | 
| 2.06 X 2.62 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         118855  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 103 | Cross Section Width N/A 2.62 mm | Durometer N/A 70 | Inside Diameter N/A 2.06 mm | Product Guides N/A Seal Guides | 
 
