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 | 
                                                        
|---|---|---|---|---|---|---|---|---|
| 4.87 X 1.8 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117821  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 70 | Inside Diameter N/A 4.87 mm | Product Guides N/A Seal Guides | 
| 4.87 X 1.8 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117822  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 90 | Inside Diameter N/A 4.87 mm | Product Guides N/A Seal Guides | 
| 5x1.80B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117823  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 70 | Inside Diameter N/A 5.00 mm | Product Guides N/A Seal Guides | 
| 5 X 1.8 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117824  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 90 | Inside Diameter N/A 5.00 mm | Product Guides N/A Seal Guides | 
| 5.15x1.80B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117825  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 70 | Inside Diameter N/A 5.15 mm | Product Guides N/A Seal Guides | 
| 5.15 X 1.8 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117826  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 90 | Inside Diameter N/A 5.15 mm | Product Guides N/A Seal Guides | 
| 5.3 X 1.8 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117827  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 70 | Inside Diameter N/A 5.30 mm | Product Guides N/A Seal Guides | 
| 5.3 X 1.8 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117828  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 90 | Inside Diameter N/A 5.30 mm | Product Guides N/A Seal Guides | 
| 5.6x1.80B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117829  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 70 | Inside Diameter N/A 5.60 mm | Product Guides N/A Seal Guides | 
| 5.6 X 1.8 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117830  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 90 | Inside Diameter N/A 5.60 mm | Product Guides N/A Seal Guides | 
| 6x1.80B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117831  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 70 | Inside Diameter N/A 6.00 mm | Product Guides N/A Seal Guides | 
| 6 X 1.8 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117832  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 90 | Inside Diameter N/A 6.00 mm | Product Guides N/A Seal Guides | 
| 6.3 X 1.8 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117833  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 70 | Inside Diameter N/A 6.30 mm | Product Guides N/A Seal Guides | 
| 6.3 X 1.8 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117834  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 90 | Inside Diameter N/A 6.30 mm | Product Guides N/A Seal Guides | 
| 8.7 X 1.8 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117835  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 70 | Inside Diameter N/A 8.70 mm | Product Guides N/A Seal Guides | 
| 8.7 X 1.8 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117836  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 90 | Inside Diameter N/A 8.70 mm | Product Guides N/A Seal Guides | 
| 6.9x1.80B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117837  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 70 | Inside Diameter N/A 6.90 mm | Product Guides N/A Seal Guides | 
| 6.9 X 1.8 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117838  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 90 | Inside Diameter N/A 6.90 mm | Product Guides N/A Seal Guides | 
| 7.5x1.80B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117839  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 70 | Inside Diameter N/A 7.50 mm | Product Guides N/A Seal Guides | 
| 7.5 X 1.8 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117840  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 90 | Inside Diameter N/A 7.50 mm | Product Guides N/A Seal Guides | 
| 8x1.80B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117841  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 70 | Inside Diameter N/A 8.00 mm | Product Guides N/A Seal Guides | 
| 8 X 1.8 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117842  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 90 | Inside Diameter N/A 8.00 mm | Product Guides N/A Seal Guides | 
| 8.5x1.80B70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117843  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 70 | Inside Diameter N/A 8.50 mm | Product Guides N/A Seal Guides | 
| 8.5 X 1.8 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117844  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 90 | Inside Diameter N/A 8.50 mm | Product Guides N/A Seal Guides | 
| 8.76 X 1.8 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         117845  | 
                                Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A | Cross Section Width N/A 1.80 mm | Durometer N/A 70 | Inside Diameter N/A 8.76 mm | Product Guides N/A Seal Guides | 
 
