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 | 
                                                        
|---|---|---|---|---|---|---|---|---|
| 117.07 X 3.53 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120995  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 247 | Cross Section Width N/A 3.53 mm | Durometer N/A 70 | Inside Diameter N/A 117.07 mm | Product Guides N/A Seal Guides | 
| 117.07 X 3.53 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120996  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 247 | Cross Section Width N/A 3.53 mm | Durometer N/A 90 | Inside Diameter N/A 117.07 mm | Product Guides N/A Seal Guides | 
| 120.24 X 3.53 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120997  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 248 | Cross Section Width N/A 3.53 mm | Durometer N/A 70 | Inside Diameter N/A 120.24 mm | Product Guides N/A Seal Guides | 
| 120.24 X 3.53 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120998  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 248 | Cross Section Width N/A 3.53 mm | Durometer N/A 90 | Inside Diameter N/A 120.24 mm | Product Guides N/A Seal Guides | 
| 123.42 X 3.53 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120999  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 249 | Cross Section Width N/A 3.53 mm | Durometer N/A 70 | Inside Diameter N/A 123.42 mm | Product Guides N/A Seal Guides | 
| 123.42 X 3.53 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121000  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 249 | Cross Section Width N/A 3.53 mm | Durometer N/A 90 | Inside Diameter N/A 123.42 mm | Product Guides N/A Seal Guides | 
| 126.59 X 3.53 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121001  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 251 | Cross Section Width N/A 3.53 mm | Durometer N/A 70 | Inside Diameter N/A 126.59 mm | Product Guides N/A Seal Guides | 
| 126.59 X 3.53 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121002  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 251 | Cross Section Width N/A 3.53 mm | Durometer N/A 90 | Inside Diameter N/A 126.59 mm | Product Guides N/A Seal Guides | 
| 129.77 X 3.53 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121003  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 251 | Cross Section Width N/A 3.53 mm | Durometer N/A 70 | Inside Diameter N/A 129.77 mm | Product Guides N/A Seal Guides | 
| 129.77 X 3.53 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121004  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 251 | Cross Section Width N/A 3.53 mm | Durometer N/A 90 | Inside Diameter N/A 129.77 mm | Product Guides N/A Seal Guides | 
| 132.94 X 3.53 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121005  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 252 | Cross Section Width N/A 3.53 mm | Durometer N/A 70 | Inside Diameter N/A 132.94 mm | Product Guides N/A Seal Guides | 
| 132.94 X 3.53 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121006  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 252 | Cross Section Width N/A 3.53 mm | Durometer N/A 90 | Inside Diameter N/A 132.94 mm | Product Guides N/A Seal Guides | 
| 136.12 X 3.53 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121007  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 253 | Cross Section Width N/A 3.53 mm | Durometer N/A 70 | Inside Diameter N/A 136.12 mm | Product Guides N/A Seal Guides | 
| 136.12 X 3.53 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121008  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 253 | Cross Section Width N/A 3.53 mm | Durometer N/A 90 | Inside Diameter N/A 136.12 mm | Product Guides N/A Seal Guides | 
| 139.29 X 3.53 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121009  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 254 | Cross Section Width N/A 3.53 mm | Durometer N/A 70 | Inside Diameter N/A 139.29 mm | Product Guides N/A Seal Guides | 
| 139.29 X 3.53 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121010  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 254 | Cross Section Width N/A 3.53 mm | Durometer N/A 90 | Inside Diameter N/A 139.29 mm | Product Guides N/A Seal Guides | 
| 142.47 X 3.53 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121011  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 256 | Cross Section Width N/A 3.53 mm | Durometer N/A 70 | Inside Diameter N/A 142.47 mm | Product Guides N/A Seal Guides | 
| 142.47 X 3.53 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121012  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 256 | Cross Section Width N/A 3.53 mm | Durometer N/A 90 | Inside Diameter N/A 142.47 mm | Product Guides N/A Seal Guides | 
| 145.64 X 3.53 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121013  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 256 | Cross Section Width N/A 3.53 mm | Durometer N/A 70 | Inside Diameter N/A 145.64 mm | Product Guides N/A Seal Guides | 
| 145.64 X 3.53 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121014  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 256 | Cross Section Width N/A 3.53 mm | Durometer N/A 90 | Inside Diameter N/A 145.64 mm | Product Guides N/A Seal Guides | 
| 148.82 X 3.53 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121015  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 257 | Cross Section Width N/A 3.53 mm | Durometer N/A 70 | Inside Diameter N/A 148.82 mm | Product Guides N/A Seal Guides | 
| 148.82 X 3.53 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121016  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 257 | Cross Section Width N/A 3.53 mm | Durometer N/A 90 | Inside Diameter N/A 148.82 mm | Product Guides N/A Seal Guides | 
| 151.99 X 3.53 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121017  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 258 | Cross Section Width N/A 3.53 mm | Durometer N/A 70 | Inside Diameter N/A 151.99 mm | Product Guides N/A Seal Guides | 
| 151.99 X 3.53 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121018  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 258 | Cross Section Width N/A 3.53 mm | Durometer N/A 90 | Inside Diameter N/A 151.99 mm | Product Guides N/A Seal Guides | 
| 158.34 X 3.53 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         121019  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 259 | Cross Section Width N/A 3.53 mm | Durometer N/A 70 | Inside Diameter N/A 158.34 mm | Product Guides N/A Seal Guides | 
 
