OneMonroe BUNA O-Rings are engineered to provide dependable sealing solutions for a wide range of industrial applications. Crafted from high-quality BUNA-N material, also known as Nitrile, these O-rings deliver exceptional resistance to oils, fuels, and various chemicals, making them a top choice for machinery, automotive, and hydraulic systems. Their robust design ensures a reliable seal in both low and high-pressure environments, protecting against leaks, contamination, and wear. Each O-ring is manufactured to precise industry standards, offering a secure fit and lasting performance that businesses can depend on in even the most demanding conditions.
Our selection of BUNA O-rings includes an extensive variety of sizes and specifications, designed to suit a wide array of sealing needs. From small to large diameters, OneMonroe provides O-rings that can be used across multiple industries, including aerospace, manufacturing, and construction. These O-rings are versatile, supporting applications that require excellent abrasion resistance and the ability to perform reliably in temperatures ranging from -40°F to 212°F. OneMonroe BUNA O-Rings are known for their compatibility with petroleum-based fluids and are often the go-to choice for applications involving oil and gas, where durability and flexibility are essential.
OneMonroe is dedicated to delivering high-quality, cost-effective solutions that meet the unique needs of its customers. Our BUNA O-rings undergo rigorous testing and quality control to ensure each product meets strict performance standards. Whether you’re in need of O-rings for maintenance, repair, or original equipment manufacturing, OneMonroe's BUNA O-rings provide a dependable, long-lasting solution. With a commitment to exceptional customer service, Monroe ensures you have access to the precise sealing products you need to keep your operations running smoothly.
For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.
Cross Section Width (in)
Cross Section Width (mm)
Durometer
Inside Diameter (in)
Inside Diameter (mm)
                            Item # | 
                        
                            IntegrationID | 
                        
                            Type | 
                        
                            Material | 
                        
                            Cross Section Width | 
                        
                            Durometer | 
                        
                            Inside Diameter | 
                        
                            CSW Tolerance | 
                        
                            BS Number | 
                        
                            Product Guides | 
                                                        
|---|---|---|---|---|---|---|---|---|---|
| BS369 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184568  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 7.975 in202.57 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -369 | Product Guides N/A Seal Guides | 
| BS368 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184569  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 7.725 in196.22 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -368 | Product Guides N/A Seal Guides | 
| BS368 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184570  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 7.725 in196.22 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -368 | Product Guides N/A Seal Guides | 
| BS367 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184571  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 7.475 in189.87 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -367 | Product Guides N/A Seal Guides | 
| BS367 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184572  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 7.475 in189.87 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -367 | Product Guides N/A Seal Guides | 
| BS366 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184573  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 7.225 in183.52 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -366 | Product Guides N/A Seal Guides | 
| BS366 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184574  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 7.225 in183.52 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -366 | Product Guides N/A Seal Guides | 
| BS365 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184575  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 6.975 in177.17 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -365 | Product Guides N/A Seal Guides | 
| BS365 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184576  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 6.975 in177.17 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -365 | Product Guides N/A Seal Guides | 
| BS364 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184577  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 6.725 in170.82 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -364 | Product Guides N/A Seal Guides | 
| BS364 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184578  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 6.725 in170.82 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -364 | Product Guides N/A Seal Guides | 
| BS363 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184579  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 6.475 in164.47 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -363 | Product Guides N/A Seal Guides | 
| BS363 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184580  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 6.475 in164.47 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -363 | Product Guides N/A Seal Guides | 
| BS362 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184581  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 6.225 in158.12 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -362 | Product Guides N/A Seal Guides | 
| BS362 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184582  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 6.225 in158.12 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -362 | Product Guides N/A Seal Guides | 
| BS361 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184583  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 5.975 in151.77 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -361 | Product Guides N/A Seal Guides | 
| BS361 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184584  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 5.975 in151.77 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -361 | Product Guides N/A Seal Guides | 
| BS360 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184585  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 5.850 in148.59 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -360 | Product Guides N/A Seal Guides | 
| BS360 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184586  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 5.850 in148.59 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -360 | Product Guides N/A Seal Guides | 
| BS359 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184587  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 5.725 in145.42 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -359 | Product Guides N/A Seal Guides | 
| BS359 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184588  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 5.725 in145.42 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -359 | Product Guides N/A Seal Guides | 
| BS358 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184589  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 5.600 in142.24 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -358 | Product Guides N/A Seal Guides | 
| BS358 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184590  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 5.600 in142.24 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -358 | Product Guides N/A Seal Guides | 
| BS357 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184591  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 5.475 in139.07 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -357 | Product Guides N/A Seal Guides | 
| BS357 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184592  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 5.475 in139.07 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -357 | Product Guides N/A Seal Guides | 
 
