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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
250.37 X 7 U-70 N/A
139162
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 7.00 mm N/A 70 N/A 250.37 mm
251 X 3.5 U-70 N/A
139163
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 251.00 mm
251 X 4 U-70 N/A
139164
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 251.00 mm
251 X 5 U-70 N/A
139165
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 251.00 mm
252 X 3.5 U-70 N/A
139166
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 252.00 mm
252 X 4 U-70 N/A
139167
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 252.00 mm
252 X 5 U-70 N/A
139168
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 252.00 mm
253 X 3.5 U-70 N/A
139169
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 253.00 mm
253 X 4 U-70 N/A
139170
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 253.00 mm
253 X 5 U-70 N/A
139171
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 253.00 mm
254 X 3.5 U-70 N/A
139175
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 254.00 mm
254 X 4 U-70 N/A
139176
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 254.00 mm
254 X 5 U-70 N/A
139177
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 254.00 mm
255 X 3 U-70 N/A
139179
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.00 mm N/A 70 N/A 255.00 mm
255 X 3.5 U-70 N/A
139180
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 255.00 mm
255 X 4 U-70 N/A
139181
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 255.00 mm
255 X 5 U-70 N/A
139182
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 255.00 mm
256 X 3.5 U-70 N/A
139183
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 256.00 mm
256 X 4 U-70 N/A
139184
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 256.00 mm
256 X 5 U-70 N/A
139185
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 256.00 mm
257 X 3.5 U-70 N/A
139186
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 257.00 mm
257 X 4 U-70 N/A
139187
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 257.00 mm
257 X 5 U-70 N/A
139188
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 5.00 mm N/A 70 N/A 257.00 mm
258 X 3.5 U-70 N/A
139189
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 3.50 mm N/A 70 N/A 258.00 mm
258 X 4 U-70 N/A
139190
N/A Metric Standard O-Ring N/A Polyurethane N/A N/A 4.00 mm N/A 70 N/A 258.00 mm
Unit of Measure
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