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OneMonroe’s Metric Polyurethane O-Rings are designed for maximum durability and exceptional sealing performance in a wide range of applications. Crafted from high-quality polyurethane, these O-rings offer outstanding resistance to abrasion, chemicals, and high-pressure environments, making them ideal for industries that demand both reliability and longevity. Whether used in hydraulics, pneumatics, or mechanical assemblies, OneMonroe’s Metric Polyurethane O-Rings deliver dependable sealing solutions that withstand tough conditions, ensuring your systems operate smoothly and efficiently.

Our metric O-rings are available in various sizes to provide versatility and precision for any engineering or industrial requirement. These O-rings are specifically designed to provide a reliable seal for metric-based equipment, allowing for exact fitment and minimal leakage. The superior strength and elasticity of polyurethane make these O-rings more durable than traditional rubber alternatives, significantly extending the service life and reducing maintenance downtime. With their exceptional chemical and temperature resistance, OneMonroe Metric Polyurethane O-Rings are a trusted choice for applications ranging from automotive systems to heavy machinery and beyond.

OneMonroe is committed to providing premium-quality products that meet the rigorous demands of our clients. Our polyurethane O-rings undergo stringent quality checks and are manufactured to exact specifications, ensuring reliable performance in diverse environments. As a trusted provider of industrial and engineering components, we support our clients with expert guidance and a wide selection of high-quality sealing solutions. When you choose OneMonroe Metric Polyurethane O-Rings, you’re investing in dependable performance, longevity, and efficiency for all your sealing needs.

For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.

Metric O-Rings
Unit of Measure
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Item #

IntegrationID

Type

Material

Cross Reference

Cross Section Width

Durometer

Inside Diameter

Quantity
184 X 6 U-70 N/A
138493
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 6.00 mm N/A 70 N/A 184.00 mm
184.1 X 8.4 U-70 N/A
138494
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 8.40 mm N/A 70 N/A 184.10 mm
184.5 X 3 U-70 N/A
138496
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.00 mm N/A 70 N/A 184.50 mm
185 X 3 U-70 N/A
138498
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.00 mm N/A 70 N/A 185.00 mm
185 X 3.5 U-70 N/A
138499
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 185.00 mm
185 X 3.55 U-70 N/A
138500
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.55 mm N/A 70 N/A 185.00 mm
185 X 4 U-70 N/A
138501
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 185.00 mm
185 X 4.5 U-70 N/A
138502
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.50 mm N/A 70 N/A 185.00 mm
185 X 5 U-70 N/A
138503
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 185.00 mm
185 X 5.3 U-70 N/A
138504
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.30 mm N/A 70 N/A 185.00 mm
185 X 6 U-70 N/A
138505
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 6.00 mm N/A 70 N/A 185.00 mm
186 X 3 U-70 N/A
138506
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.00 mm N/A 70 N/A 186.00 mm
186 X 3.5 U-70 N/A
138507
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 186.00 mm
186 X 4 U-70 N/A
138508
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 186.00 mm
186 X 4.5 U-70 N/A
138509
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.50 mm N/A 70 N/A 186.00 mm
186 X 5 U-70 N/A
138510
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 186.00 mm
187 X 3 U-70 N/A
138511
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.00 mm N/A 70 N/A 187.00 mm
187 X 3.5 U-70 N/A
138512
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 187.00 mm
187 X 4 U-70 N/A
138513
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 187.00 mm
187 X 5 U-70 N/A
138514
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 187.00 mm
188 X 3 U-70 N/A
138516
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.00 mm N/A 70 N/A 188.00 mm
188 X 3.5 U-70 N/A
138517
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 188.00 mm
188 X 4 U-70 N/A
138518
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 188.00 mm
188 X 5 U-70 N/A
138519
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 188.00 mm
188 X 6 U-70 N/A
138520
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 6.00 mm N/A 70 N/A 188.00 mm
Unit of Measure
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