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 | 
                                                        
|---|---|---|---|---|---|---|---|---|---|
| BS903 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184193  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.064 in1.63 mm | Durometer N/A 70 | Inside Diameter N/A 0.301 in7.65 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -903 | Product Guides N/A Seal Guides | 
| BS903 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184194  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.064 in1.63 mm | Durometer N/A 90 | Inside Diameter N/A 0.301 in7.65 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -903 | Product Guides N/A Seal Guides | 
| BS902 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184195  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.064 in1.63 mm | Durometer N/A 70 | Inside Diameter N/A 0.239 in6.07 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -902 | Product Guides N/A Seal Guides | 
| BS902 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184196  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.064 in1.63 mm | Durometer N/A 90 | Inside Diameter N/A 0.239 in6.07 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -902 | Product Guides N/A Seal Guides | 
| BS886 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184197  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 7.875 in200.03 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -886 | Product Guides N/A Seal Guides | 
| BS886 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184198  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 90 | Inside Diameter N/A 7.875 in200.03 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -886 | Product Guides N/A Seal Guides | 
| BS884 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184199  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 7.625 in193.68 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -884 | Product Guides N/A Seal Guides | 
| BS884 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184200  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 90 | Inside Diameter N/A 7.625 in193.68 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -884 | Product Guides N/A Seal Guides | 
| BS882 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184201  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 7.375 in187.33 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -882 | Product Guides N/A Seal Guides | 
| BS882 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184202  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 90 | Inside Diameter N/A 7.375 in187.33 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -882 | Product Guides N/A Seal Guides | 
| BS880 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184203  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 7.125 in180.98 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -880 | Product Guides N/A Seal Guides | 
| BS880 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184204  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 90 | Inside Diameter N/A 7.125 in180.98 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -880 | Product Guides N/A Seal Guides | 
| BS878 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184205  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 6.875 in174.63 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -878 | Product Guides N/A Seal Guides | 
| BS878 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184206  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 90 | Inside Diameter N/A 6.875 in174.63 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -878 | Product Guides N/A Seal Guides | 
| BS876 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184207  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 6.625 in168.28 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -876 | Product Guides N/A Seal Guides | 
| BS876 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184208  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 90 | Inside Diameter N/A 6.625 in168.28 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -876 | Product Guides N/A Seal Guides | 
| BS874 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184209  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 6.375 in161.93 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -874 | Product Guides N/A Seal Guides | 
| BS874 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184210  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 90 | Inside Diameter N/A 6.375 in161.93 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -874 | Product Guides N/A Seal Guides | 
| BS872 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184211  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 70 | Inside Diameter N/A 6.125 in155.58 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -872 | Product Guides N/A Seal Guides | 
| BS872 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184212  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.275 in6.99 mm | Durometer N/A 90 | Inside Diameter N/A 6.125 in155.58 mm | CSW Tolerance N/A 0.006 in0.15 mm | BS Number N/A -872 | Product Guides N/A Seal Guides | 
| BS870 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184213  | 
                                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 5.875 in149.23 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -870 | Product Guides N/A Seal Guides | 
| BS870 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184214  | 
                                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 5.875 in149.23 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -870 | Product Guides N/A Seal Guides | 
| BS869 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184215  | 
                                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 5.75 in146.05 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -869 | Product Guides N/A Seal Guides | 
| BS869 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184216  | 
                                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 5.75 in146.05 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -869 | Product Guides N/A Seal Guides | 
| BS868 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         184217  | 
                                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 5.625 in142.88 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -868 | Product Guides N/A Seal Guides | 
 
