
OneMonroe Polyurethane O-Rings are designed for applications that demand superior wear resistance, flexibility, and resilience. Constructed from high-quality polyurethane material, these O-rings offer an excellent balance between strength and elasticity, making them perfect for heavy-duty applications where traditional rubber rings may fail. Polyurethane is renowned for its exceptional tear resistance, abrasion tolerance, and longevity, enabling OneMonroe O-Rings to deliver reliable performance even in challenging environments. From industrial machinery and automotive components to hydraulic and pneumatic systems, our polyurethane O-rings provide a dependable seal in numerous applications.
These O-rings are manufactured to precise standards, ensuring a consistent and reliable fit for various equipment and machinery. Polyurethane material is particularly well-suited for sealing applications that encounter high-pressure or high-vibration conditions, as it is less prone to deformation and degradation over time. Available in a broad range of sizes, OneMonroe Polyurethane O-Rings meet diverse requirements, providing dependable sealing solutions that minimize maintenance and downtime. Our commitment to quality means each O-ring undergoes rigorous testing to ensure optimal performance, whether in low-friction, static sealing, or dynamic, high-motion environments.
At Monroe, we prioritize durability, efficiency, and adaptability in every product we offer. Our polyurethane O-rings are specifically engineered for durability and longevity, reducing the need for frequent replacements. For industries where reliability is essential, OneMonroe Polyurethane O-Rings provide a practical and cost-effective solution that withstands the rigors of daily operation. Whether you need to upgrade an existing system or are working on a new project, OneMonroe offers the high-performance polyurethane O-rings you can count on to keep your equipment running smoothly and effectively.
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 Section Width | Durometer | Inside Diameter | CSW Tolerance | BS Number | Product Guides | Quantity | 
|---|---|---|---|---|---|---|---|---|---|---|
| BS448 U-90 | N/A 182616 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 90 | N/A 9.475 in240.67 mm | N/A 0.006 in0.15 mm | N/A -448 | N/A Seal Guides | |
| BS447 U-70 | N/A 182617 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 70 | N/A 8.975 in227.97 mm | N/A 0.006 in0.15 mm | N/A -447 | N/A Seal Guides | |
| BS447 U-90 | N/A 182618 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 90 | N/A 8.975 in227.97 mm | N/A 0.006 in0.15 mm | N/A -447 | N/A Seal Guides | |
| BS446 U-70 | N/A 182619 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 70 | N/A 8.475 in215.27 mm | N/A 0.006 in0.15 mm | N/A -446 | N/A Seal Guides | |
| BS446 U-90 | N/A 182620 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 90 | N/A 8.475 in215.27 mm | N/A 0.006 in0.15 mm | N/A -446 | N/A Seal Guides | |
| BS445 U-70 | N/A 182621 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 70 | N/A 7.975 in202.57 mm | N/A 0.006 in0.15 mm | N/A -445 | N/A Seal Guides | |
| BS445 U-90 | N/A 182622 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 90 | N/A 7.975 in202.57 mm | N/A 0.006 in0.15 mm | N/A -445 | N/A Seal Guides | |
| BS444 U-70 | N/A 182623 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 70 | N/A 7.725 in196.22 mm | N/A 0.006 in0.15 mm | N/A -444 | N/A Seal Guides | |
| BS444 U-90 | N/A 182624 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 90 | N/A 7.725 in196.22 mm | N/A 0.006 in0.15 mm | N/A -444 | N/A Seal Guides | |
| BS443 U-70 | N/A 182625 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 70 | N/A 7.475 in189.87 mm | N/A 0.006 in0.15 mm | N/A -443 | N/A Seal Guides | |
| BS443 U-90 | N/A 182626 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 90 | N/A 7.475 in189.87 mm | N/A 0.006 in0.15 mm | N/A -443 | N/A Seal Guides | |
| BS442 U-70 | N/A 182627 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 70 | N/A 7.225 in183.52 mm | N/A 0.006 in0.15 mm | N/A -442 | N/A Seal Guides | |
| BS442 U-90 | N/A 182628 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 90 | N/A 7.225 in183.52 mm | N/A 0.006 in0.15 mm | N/A -442 | N/A Seal Guides | |
| BS441 U-70 | N/A 182629 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 70 | N/A 6.975 in177.17 mm | N/A 0.006 in0.15 mm | N/A -441 | N/A Seal Guides | |
| BS441 U-90 | N/A 182630 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 90 | N/A 6.975 in177.17 mm | N/A 0.006 in0.15 mm | N/A -441 | N/A Seal Guides | |
| BS440 U-70 | N/A 182631 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 70 | N/A 6.725 in170.82 mm | N/A 0.006 in0.15 mm | N/A -440 | N/A Seal Guides | |
| BS440 U-90 | N/A 182632 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 90 | N/A 6.725 in170.82 mm | N/A 0.006 in0.15 mm | N/A -440 | N/A Seal Guides | |
| BS439 U-70 | N/A 182633 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 70 | N/A 6.475 in164.47 mm | N/A 0.006 in0.15 mm | N/A -439 | N/A Seal Guides | |
| BS439 U-90 | N/A 182634 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 90 | N/A 6.475 in164.47 mm | N/A 0.006 in0.15 mm | N/A -439 | N/A Seal Guides | |
| BS438 U-70 | N/A 182635 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 70 | N/A 6.225 in158.12 mm | N/A 0.006 in0.15 mm | N/A -438 | N/A Seal Guides | |
| BS438 U-90 | N/A 182636 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 90 | N/A 6.225 in158.12 mm | N/A 0.006 in0.15 mm | N/A -438 | N/A Seal Guides | |
| BS437 U-70 | N/A 182637 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 70 | N/A 5.975 in151.77 mm | N/A 0.006 in0.15 mm | N/A -437 | N/A Seal Guides | |
| BS437 U-90 | N/A 182638 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 90 | N/A 5.975 in151.77 mm | N/A 0.006 in0.15 mm | N/A -437 | N/A Seal Guides | |
| BS436 U-70 | N/A 182639 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 70 | N/A 5.850 in148.59 mm | N/A 0.006 in0.15 mm | N/A -436 | N/A Seal Guides | |
| BS436 U-90 | N/A 182640 | N/A BS Standard O-Ring | N/A Polyurethane | N/A 0.275 in6.99 mm | N/A 90 | N/A 5.850 in148.59 mm | N/A 0.006 in0.15 mm | N/A -436 | N/A Seal Guides | 
