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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
142 X 5 U-70 N/A
138038
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 142.00 mm
142 X 6 U-70 N/A
138039
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 6.00 mm N/A 70 N/A 142.00 mm
143 X 2.5 U-70 N/A
138045
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 2.50 mm N/A 70 N/A 143.00 mm
143 X 3 U-70 N/A
138046
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.00 mm N/A 70 N/A 143.00 mm
143 X 3.5 U-70 N/A
138047
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 143.00 mm
143 X 4 U-70 N/A
138048
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 143.00 mm
143 X 5 U-70 N/A
138049
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 143.00 mm
143 X 6 U-70 N/A
138050
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 6.00 mm N/A 70 N/A 143.00 mm
144 X 2.5 U-70 N/A
138051
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 2.50 mm N/A 70 N/A 144.00 mm
144 X 3 U-70 N/A
138052
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.00 mm N/A 70 N/A 144.00 mm
144 X 3.5 U-70 N/A
138053
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 144.00 mm
144 X 4 U-70 N/A
138054
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 144.00 mm
144 X 5 U-70 N/A
138055
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 144.00 mm
144.1 X 8.4 U-70 N/A
138056
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 8.40 mm N/A 70 N/A 144.10 mm
144.2 X 5.7 U-70 N/A
138057
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.70 mm N/A 70 N/A 144.20 mm
144.3 X 5.7 U-70 N/A
138058
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.70 mm N/A 70 N/A 144.30 mm
144.5 X 3 U-70 N/A
138061
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.00 mm N/A 70 N/A 144.50 mm
145 X 2.5 U-70 N/A
138063
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 2.50 mm N/A 70 N/A 145.00 mm
145 X 3 U-70 N/A
138064
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.00 mm N/A 70 N/A 145.00 mm
145 X 3.5 U-70 N/A
138065
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 145.00 mm
145 X 3.55 U-70 N/A
138066
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.55 mm N/A 70 N/A 145.00 mm
145 X 4 U-70 N/A
138067
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 145.00 mm
145 X 5 U-70 N/A
138068
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 145.00 mm
145 X 5.3 U-70 N/A
138069
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.30 mm N/A 70 N/A 145.00 mm
145 X 5.5 U-70 N/A
138070
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.50 mm N/A 70 N/A 145.00 mm
Unit of Measure
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