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 | 
                                                        
|---|---|---|---|---|---|---|---|---|
| 374 X 3.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120718  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 90 | Inside Diameter N/A 374.00 mm | Product Guides N/A Seal Guides | 
| 375x3.50B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120719  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 70 | Inside Diameter N/A 375.00 mm | Product Guides N/A Seal Guides | 
| 375 X 3.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120720  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 90 | Inside Diameter N/A 375.00 mm | Product Guides N/A Seal Guides | 
| 376 X 3.5 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120721  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 70 | Inside Diameter N/A 376.00 mm | Product Guides N/A Seal Guides | 
| 376 X 3.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120722  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 90 | Inside Diameter N/A 376.00 mm | Product Guides N/A Seal Guides | 
| 377 X 3.5 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120723  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 70 | Inside Diameter N/A 377.00 mm | Product Guides N/A Seal Guides | 
| 377 X 3.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120724  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 90 | Inside Diameter N/A 377.00 mm | Product Guides N/A Seal Guides | 
| 378 X 3.5 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120725  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 70 | Inside Diameter N/A 378.00 mm | Product Guides N/A Seal Guides | 
| 378 X 3.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120726  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 90 | Inside Diameter N/A 378.00 mm | Product Guides N/A Seal Guides | 
| 379 X 3.5 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120727  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 70 | Inside Diameter N/A 379.00 mm | Product Guides N/A Seal Guides | 
| 379 X 3.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120728  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 90 | Inside Diameter N/A 379.00 mm | Product Guides N/A Seal Guides | 
| 380 X 3.5 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120729  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 70 | Inside Diameter N/A 380.00 mm | Product Guides N/A Seal Guides | 
| 380 X 3.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120730  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 90 | Inside Diameter N/A 380.00 mm | Product Guides N/A Seal Guides | 
| 381 X 3.5 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120731  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 70 | Inside Diameter N/A 381.00 mm | Product Guides N/A Seal Guides | 
| 381 X 3.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120732  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 90 | Inside Diameter N/A 381.00 mm | Product Guides N/A Seal Guides | 
| 382 X 3.5 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120733  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 70 | Inside Diameter N/A 382.00 mm | Product Guides N/A Seal Guides | 
| 382 X 3.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120734  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 90 | Inside Diameter N/A 382.00 mm | Product Guides N/A Seal Guides | 
| 383 X 3.5 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120735  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 70 | Inside Diameter N/A 383.00 mm | Product Guides N/A Seal Guides | 
| 383 X 3.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120736  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 90 | Inside Diameter N/A 383.00 mm | Product Guides N/A Seal Guides | 
| 384 X 3.5 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120737  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 70 | Inside Diameter N/A 384.00 mm | Product Guides N/A Seal Guides | 
| 384 X 3.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120738  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 90 | Inside Diameter N/A 384.00 mm | Product Guides N/A Seal Guides | 
| 385 X 3.5 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120739  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 70 | Inside Diameter N/A 385.00 mm | Product Guides N/A Seal Guides | 
| 385 X 3.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120740  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 90 | Inside Diameter N/A 385.00 mm | Product Guides N/A Seal Guides | 
| 386 X 3.5 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120741  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 70 | Inside Diameter N/A 386.00 mm | Product Guides N/A Seal Guides | 
| 386 X 3.5 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         120742  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 3.50 mm | Durometer N/A 90 | Inside Diameter N/A 386.00 mm | Product Guides N/A Seal Guides | 
 
