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 | 
|---|---|---|---|---|---|---|---|---|
| 50.52 X 1.78 B-70 | IntegrationID                                                    
 N/A 117721 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 33 | Cross Section Width N/A 1.78 mm | Durometer N/A 70 | Inside Diameter N/A 50.52 mm | Product Guides N/A Seal Guides | 
| 50.52 X 1.78 B-90 | IntegrationID                                                    
 N/A 117722 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 33 | Cross Section Width N/A 1.78 mm | Durometer N/A 90 | Inside Diameter N/A 50.52 mm | Product Guides N/A Seal Guides | 
| 53.7 X 1.78 B-70 | IntegrationID                                                    
 N/A 117723 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 34 | Cross Section Width N/A 1.78 mm | Durometer N/A 70 | Inside Diameter N/A 53.70 mm | Product Guides N/A Seal Guides | 
| 53.7 X 1.78 B-90 | IntegrationID                                                    
 N/A 117724 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 34 | Cross Section Width N/A 1.78 mm | Durometer N/A 90 | Inside Diameter N/A 53.70 mm | Product Guides N/A Seal Guides | 
| 56.87 X 1.78 B-70 | IntegrationID                                                    
 N/A 117725 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 35 | Cross Section Width N/A 1.78 mm | Durometer N/A 70 | Inside Diameter N/A 56.87 mm | Product Guides N/A Seal Guides | 
| 56.87 X 1.78 B-90 | IntegrationID                                                    
 N/A 117726 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 35 | Cross Section Width N/A 1.78 mm | Durometer N/A 90 | Inside Diameter N/A 56.87 mm | Product Guides N/A Seal Guides | 
| 60.05 X 1.78 B-70 | IntegrationID                                                    
 N/A 117727 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 36 | Cross Section Width N/A 1.78 mm | Durometer N/A 70 | Inside Diameter N/A 60.05 mm | Product Guides N/A Seal Guides | 
| 60.05 X 1.78 B-90 | IntegrationID                                                    
 N/A 117728 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 36 | Cross Section Width N/A 1.78 mm | Durometer N/A 90 | Inside Diameter N/A 60.05 mm | Product Guides N/A Seal Guides | 
| 63.22 X 1.78 B-70 | IntegrationID                                                    
 N/A 117729 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 37 | Cross Section Width N/A 1.78 mm | Durometer N/A 70 | Inside Diameter N/A 63.22 mm | Product Guides N/A Seal Guides | 
| 63.22 X 1.78 B-90 | IntegrationID                                                    
 N/A 117730 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 37 | Cross Section Width N/A 1.78 mm | Durometer N/A 90 | Inside Diameter N/A 63.22 mm | Product Guides N/A Seal Guides | 
| 66.4 X 1.78 B-70 | IntegrationID                                                    
 N/A 117731 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 38 | Cross Section Width N/A 1.78 mm | Durometer N/A 70 | Inside Diameter N/A 66.40 mm | Product Guides N/A Seal Guides | 
| 66.4 X 1.78 B-90 | IntegrationID                                                    
 N/A 117732 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 38 | Cross Section Width N/A 1.78 mm | Durometer N/A 90 | Inside Diameter N/A 66.40 mm | Product Guides N/A Seal Guides | 
| 69.57 X 1.78 B-70 | IntegrationID                                                    
 N/A 117733 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 39 | Cross Section Width N/A 1.78 mm | Durometer N/A 70 | Inside Diameter N/A 69.57 mm | Product Guides N/A Seal Guides | 
| 69.57 X 1.78 B-90 | IntegrationID                                                    
 N/A 117734 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 39 | Cross Section Width N/A 1.78 mm | Durometer N/A 90 | Inside Diameter N/A 69.57 mm | Product Guides N/A Seal Guides | 
| 72.75 X 1.78 B-70 | IntegrationID                                                    
 N/A 117735 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 40 | Cross Section Width N/A 1.78 mm | Durometer N/A 70 | Inside Diameter N/A 72.75 mm | Product Guides N/A Seal Guides | 
| 72.75 X 1.78 B-90 | IntegrationID                                                    
 N/A 117736 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 40 | Cross Section Width N/A 1.78 mm | Durometer N/A 90 | Inside Diameter N/A 72.75 mm | Product Guides N/A Seal Guides | 
| 75.92 X 1.78 B-70 | IntegrationID                                                    
 N/A 117737 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 41 | Cross Section Width N/A 1.78 mm | Durometer N/A 70 | Inside Diameter N/A 75.92 mm | Product Guides N/A Seal Guides | 
| 75.92 X 1.78 B-90 | IntegrationID                                                    
 N/A 117738 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 41 | Cross Section Width N/A 1.78 mm | Durometer N/A 90 | Inside Diameter N/A 75.92 mm | Product Guides N/A Seal Guides | 
| 79 X 1.78 B-70 | IntegrationID                                                    
 N/A 117739 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A BS532 | Cross Section Width N/A 1.78 mm | Durometer N/A 70 | Inside Diameter N/A 79.00 mm | Product Guides N/A Seal Guides | 
| 79 X 1.78 B-90 | IntegrationID                                                    
 N/A 117740 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A BS532 | Cross Section Width N/A 1.78 mm | Durometer N/A 90 | Inside Diameter N/A 79.00 mm | Product Guides N/A Seal Guides | 
| 82.27 X 1.78 B-70 | IntegrationID                                                    
 N/A 117741 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 42 | Cross Section Width N/A 1.78 mm | Durometer N/A 70 | Inside Diameter N/A 82.27 mm | Product Guides N/A Seal Guides | 
| 82.27 X 1.78 B-90 | IntegrationID                                                    
 N/A 117742 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 42 | Cross Section Width N/A 1.78 mm | Durometer N/A 90 | Inside Diameter N/A 82.27 mm | Product Guides N/A Seal Guides | 
| 85.34 X 1.78 B-70 | IntegrationID                                                    
 N/A 117743 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A BS534 | Cross Section Width N/A 1.78 mm | Durometer N/A 70 | Inside Diameter N/A 85.34 mm | Product Guides N/A Seal Guides | 
| 85.34 X 1.78 B-90 | IntegrationID                                                    
 N/A 117744 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A BS534 | Cross Section Width N/A 1.78 mm | Durometer N/A 90 | Inside Diameter N/A 85.34 mm | Product Guides N/A Seal Guides | 
| 88.62 X 1.78 B-70 | IntegrationID                                                    
 N/A 117745 | Type N/A Metric Standard O-Ring | Material N/A Buna | Cross Reference N/A 43 | Cross Section Width N/A 1.78 mm | Durometer N/A 70 | Inside Diameter N/A 88.62 mm | Product Guides N/A Seal Guides | 
 
 

