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 | 
                                                        
|---|---|---|---|---|---|---|---|---|---|
| BS19 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185068  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 0.801 in20.35 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -019 | Product Guides N/A Seal Guides | 
| BS18 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185069  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 0.739 in18.77 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -018 | Product Guides N/A Seal Guides | 
| BS18 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185070  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 0.739 in18.77 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -018 | Product Guides N/A Seal Guides | 
| BS17 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185071  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 0.676 in17.17 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -017 | Product Guides N/A Seal Guides | 
| BS17 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185072  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 0.676 in17.17 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -017 | Product Guides N/A Seal Guides | 
| BS16 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185073  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 0.614 in15.6 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -016 | Product Guides N/A Seal Guides | 
| BS16 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185074  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 0.614 in15.6 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -016 | Product Guides N/A Seal Guides | 
| BS15 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185075  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 0.551 in14.00 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -015 | Product Guides N/A Seal Guides | 
| BS15 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185076  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 0.551 in14.00 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -015 | Product Guides N/A Seal Guides | 
| BS14 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185077  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 0.489 in12.42 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -014 | Product Guides N/A Seal Guides | 
| BS14 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185078  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 0.489 in12.42 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -014 | Product Guides N/A Seal Guides | 
| BS13 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185079  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 0.426 in10.82 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -013 | Product Guides N/A Seal Guides | 
| BS13 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185080  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 0.426 in10.82 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -013 | Product Guides N/A Seal Guides | 
| BS12 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185081  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 0.364 in9.25 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -012 | Product Guides N/A Seal Guides | 
| BS12 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185082  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 0.364 in9.25 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -012 | Product Guides N/A Seal Guides | 
| BS11 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185083  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 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 -011 | Product Guides N/A Seal Guides | 
| BS11 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185084  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 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 -011 | Product Guides N/A Seal Guides | 
| BS10 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185085  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 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 -010 | Product Guides N/A Seal Guides | 
| BS10 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185086  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 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 -010 | Product Guides N/A Seal Guides | 
| BS9 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185087  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 0.208 in5.28 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -009 | Product Guides N/A Seal Guides | 
| BS9 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185088  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 0.208 in5.28 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -009 | Product Guides N/A Seal Guides | 
| BS8 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185089  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 0.176 in4.47 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -008 | Product Guides N/A Seal Guides | 
| BS8 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185090  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 0.176 in4.47 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -008 | Product Guides N/A Seal Guides | 
| BS7 B-70 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185091  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 0.145 in3.68 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -007 | Product Guides N/A Seal Guides | 
| BS7 B-90 | 
                                    
                                        IntegrationID                                                    
 N/A                                                         185092  | 
                                Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 0.145 in3.68 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -007 | Product Guides N/A Seal Guides | 
 
