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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
378 X 4 U-70 N/A
140015
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 378.00 mm
378 X 5 U-70 N/A
140016
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 378.00 mm
379 X 3.5 U-70 N/A
140017
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 379.00 mm
379 X 4 U-70 N/A
140018
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 379.00 mm
379 X 5 U-70 N/A
140019
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 379.00 mm
379.3 X 5.7 U-70 N/A
140020
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.70 mm N/A 70 N/A 379.30 mm
38 X 1.5 U-70 N/A
140021
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 1.50 mm N/A 70 N/A 38.00 mm
38 X 10 U-70 N/A
140022
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 10.00 mm N/A 70 N/A 38.00 mm
38 X 2 U-70 N/A
140023
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 2.00 mm N/A 70 N/A 38.00 mm
38 X 2.5 U-70 N/A
140024
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 2.50 mm N/A 70 N/A 38.00 mm
38 X 3 U-70 N/A
140025
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.00 mm N/A 70 N/A 38.00 mm
38 X 3.5 U-70 N/A
140026
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 38.00 mm
38 X 4 U-70 N/A
140027
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 38.00 mm
38 X 4.5 U-70 N/A
140028
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.50 mm N/A 70 N/A 38.00 mm
38 X 5 U-70 N/A
140029
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 38.00 mm
38 X 6 U-70 N/A
140030
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 6.00 mm N/A 70 N/A 38.00 mm
38.5 X 1.5 U-70 N/A
140031
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 1.50 mm N/A 70 N/A 38.50 mm
38.5 X 2.5 U-70 N/A
140033
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 2.50 mm N/A 70 N/A 38.50 mm
38.5 X 3 U-70 N/A
140034
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.00 mm N/A 70 N/A 38.50 mm
38.7 X 2.65 U-70 N/A
140035
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 2.65 mm N/A 70 N/A 38.70 mm
38.7 X 3.55 U-70 N/A
140037
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.55 mm N/A 70 N/A 38.70 mm
380 X 10 U-70 N/A
140038
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 10.00 mm N/A 70 N/A 380.00 mm
380 X 3.5 U-70 N/A
140039
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 380.00 mm
380 X 4 U-70 N/A
140040
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 380.00 mm
380 X 5 U-70 N/A
140041
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 380.00 mm
Unit of Measure
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