
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 | 
                                            Quantity | 
|---|---|---|---|---|---|---|---|---|---|
| 158.34 X 3.53 B-90 | 
                                    
                                                                                            
 N/A                                                         121020  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 259 | N/A 3.53 mm | N/A 90 | N/A 158.34 mm | N/A Seal Guides | |
| 158.82 X 3.53 B-70 | 
                                    
                                                                                            
 N/A                                                         121021  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A | N/A 3.53 mm | N/A 70 | N/A 158.82 mm | N/A Seal Guides | |
| 158.82 X 3.53 B-90 | 
                                    
                                                                                            
 N/A                                                         121022  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A | N/A 3.53 mm | N/A 90 | N/A 158.82 mm | N/A Seal Guides | |
| 164.69 X 3.53 B-70 | 
                                    
                                                                                            
 N/A                                                         121023  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 260 | N/A 3.53 mm | N/A 70 | N/A 164.69 mm | N/A Seal Guides | |
| 164.69 X 3.53 B-90 | 
                                    
                                                                                            
 N/A                                                         121024  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 260 | N/A 3.53 mm | N/A 90 | N/A 164.69 mm | N/A Seal Guides | |
| 171.04 X 3.53 B-70 | 
                                    
                                                                                            
 N/A                                                         121025  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 261 | N/A 3.53 mm | N/A 70 | N/A 171.04 mm | N/A Seal Guides | |
| 171.04 X 3.53 B-90 | 
                                    
                                                                                            
 N/A                                                         121026  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 261 | N/A 3.53 mm | N/A 90 | N/A 171.04 mm | N/A Seal Guides | |
| 177.39 X 3.53 B-70 | 
                                    
                                                                                            
 N/A                                                         121027  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 262 | N/A 3.53 mm | N/A 70 | N/A 177.39 mm | N/A Seal Guides | |
| 177.39 X 3.53 B-90 | 
                                    
                                                                                            
 N/A                                                         121028  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 262 | N/A 3.53 mm | N/A 90 | N/A 177.39 mm | N/A Seal Guides | |
| 183.74 X 3.53 B-70 | 
                                    
                                                                                            
 N/A                                                         121029  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 263 | N/A 3.53 mm | N/A 70 | N/A 183.74 mm | N/A Seal Guides | |
| 183.74 X 3.53 B-90 | 
                                    
                                                                                            
 N/A                                                         121030  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 263 | N/A 3.53 mm | N/A 90 | N/A 183.74 mm | N/A Seal Guides | |
| 190.09 X 3.53 B-70 | 
                                    
                                                                                            
 N/A                                                         121031  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 264 | N/A 3.53 mm | N/A 70 | N/A 190.09 mm | N/A Seal Guides | |
| 190.09 X 3.53 B-90 | 
                                    
                                                                                            
 N/A                                                         121032  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 264 | N/A 3.53 mm | N/A 90 | N/A 190.09 mm | N/A Seal Guides | |
| 196.44 X 3.53 B-70 | 
                                    
                                                                                            
 N/A                                                         121033  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 265 | N/A 3.53 mm | N/A 70 | N/A 196.44 mm | N/A Seal Guides | |
| 196.44 X 3.53 B-90 | 
                                    
                                                                                            
 N/A                                                         121034  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 265 | N/A 3.53 mm | N/A 90 | N/A 196.44 mm | N/A Seal Guides | |
| 202.79 X 3.53 B-70 | 
                                    
                                                                                            
 N/A                                                         121035  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 266 | N/A 3.53 mm | N/A 70 | N/A 202.79 mm | N/A Seal Guides | |
| 202.79 X 3.53 B-90 | 
                                    
                                                                                            
 N/A                                                         121036  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 266 | N/A 3.53 mm | N/A 90 | N/A 202.79 mm | N/A Seal Guides | |
| 209.14 X 3.53 B-70 | 
                                    
                                                                                            
 N/A                                                         121037  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 267 | N/A 3.53 mm | N/A 70 | N/A 209.14 mm | N/A Seal Guides | |
| 209.14 X 3.53 B-90 | 
                                    
                                                                                            
 N/A                                                         121038  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 267 | N/A 3.53 mm | N/A 90 | N/A 209.14 mm | N/A Seal Guides | |
| 215.49 X 3.53 B-70 | 
                                    
                                                                                            
 N/A                                                         121039  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 268 | N/A 3.53 mm | N/A 70 | N/A 215.49 mm | N/A Seal Guides | |
| 215.49 X 3.53 B-90 | 
                                    
                                                                                            
 N/A                                                         121040  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 268 | N/A 3.53 mm | N/A 90 | N/A 215.49 mm | N/A Seal Guides | |
| 221.84 X 3.53 B-70 | 
                                    
                                                                                            
 N/A                                                         121041  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 269 | N/A 3.53 mm | N/A 70 | N/A 221.84 mm | N/A Seal Guides | |
| 221.84 X 3.53 B-90 | 
                                    
                                                                                            
 N/A                                                         121042  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 269 | N/A 3.53 mm | N/A 90 | N/A 221.84 mm | N/A Seal Guides | |
| 228.19 X 3.53 B-70 | 
                                    
                                                                                            
 N/A                                                         121043  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 270 | N/A 3.53 mm | N/A 70 | N/A 228.19 mm | N/A Seal Guides | |
| 228.19 X 3.53 B-90 | 
                                    
                                                                                            
 N/A                                                         121044  | 
                                N/A Metric Standard O-Ring | N/A Buna | N/A 270 | N/A 3.53 mm | N/A 90 | N/A 228.19 mm | N/A Seal Guides |