Metric Polyurethane O-Rings

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.

Item #	IntegrationID	Type	Material	Cross Reference	Cross Section Width	Durometer	Inside Diameter
21 X 4 U-70	N/A 138766	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 4.00 mm	N/A 70	N/A 21.00 mm
21 X 4.5 U-70	N/A 138767	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 4.50 mm	N/A 70	N/A 21.00 mm
21 X 5 U-70	N/A 138768	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 5.00 mm	N/A 70	N/A 21.00 mm
21 X 6 U-70	N/A 138769	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 6.00 mm	N/A 70	N/A 21.00 mm
21.1 X 1.6 U-70	N/A 138770	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 1.60 mm	N/A 70	N/A 21.10 mm
21.2 X 2.65 U-70	N/A 138771	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 2.65 mm	N/A 70	N/A 21.20 mm
21.2 X 3.55 U-70	N/A 138772	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 3.55 mm	N/A 70	N/A 21.20 mm
21.3 X 2.4 U-70	N/A 138773	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 2.40 mm	N/A 70	N/A 21.30 mm
21.3 X 3.6 U-70	N/A 138774	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 3.60 mm	N/A 70	N/A 21.30 mm
21.47 X 1.78 U-70	N/A 138775	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 1.78 mm	N/A 70	N/A 21.47 mm
21.5 X 1 U-70	N/A 138776	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 1.00 mm	N/A 70	N/A 21.50 mm
21.5 X 2 U-70	N/A 138778	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 2.00 mm	N/A 70	N/A 21.50 mm
21.5 X 2.4 U-70	N/A 138779	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 2.40 mm	N/A 70	N/A 21.50 mm
21.5 X 2.5 U-70	N/A 138780	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 2.50 mm	N/A 70	N/A 21.50 mm
21.5 X 3 U-70	N/A 138781	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 3.00 mm	N/A 70	N/A 21.50 mm
21.5 X 4.5 U-70	N/A 138782	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 4.50 mm	N/A 70	N/A 21.50 mm
21.6 X 2.4 U-70	N/A 138784	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 2.40 mm	N/A 70	N/A 21.60 mm
210 X 3 U-70	N/A 138792	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 3.00 mm	N/A 70	N/A 210.00 mm
210 X 3.5 U-70	N/A 138793	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 3.50 mm	N/A 70	N/A 210.00 mm
210 X 4 U-70	N/A 138794	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 4.00 mm	N/A 70	N/A 210.00 mm
210 X 5 U-70	N/A 138795	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 5.00 mm	N/A 70	N/A 210.00 mm
210 X 6 U-70	N/A 138796	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 6.00 mm	N/A 70	N/A 210.00 mm
211 X 3 U-70	N/A 138797	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 3.00 mm	N/A 70	N/A 211.00 mm
211 X 3.5 U-70	N/A 138798	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 3.50 mm	N/A 70	N/A 211.00 mm
211 X 4 U-70	N/A 138799	N/A Metric Standard O-Ring	N/A Polyurethane	N/A	N/A 4.00 mm	N/A 70	N/A 211.00 mm

N/A
138766

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 4.00 mm

N/A 70

N/A 21.00 mm

21 X 4.5 U-70

N/A
138767

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 4.50 mm

N/A 70

N/A 21.00 mm

21 X 5 U-70

N/A
138768

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 5.00 mm

N/A 70

N/A 21.00 mm

21 X 6 U-70

N/A
138769

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 6.00 mm

N/A 70

N/A 21.00 mm

21.1 X 1.6 U-70

N/A
138770

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 1.60 mm

N/A 70

N/A 21.10 mm

21.2 X 2.65 U-70

N/A
138771

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 2.65 mm

N/A 70

N/A 21.20 mm

21.2 X 3.55 U-70

N/A
138772

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 3.55 mm

N/A 70

N/A 21.20 mm

21.3 X 2.4 U-70

N/A
138773

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 2.40 mm

N/A 70

N/A 21.30 mm

21.3 X 3.6 U-70

N/A
138774

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 3.60 mm

N/A 70

N/A 21.30 mm

21.47 X 1.78 U-70

N/A
138775

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 1.78 mm

N/A 70

N/A 21.47 mm

21.5 X 1 U-70

N/A
138776

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 1.00 mm

N/A 70

N/A 21.50 mm

21.5 X 2 U-70

N/A
138778

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 2.00 mm

N/A 70

N/A 21.50 mm

21.5 X 2.4 U-70

N/A
138779

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 2.40 mm

N/A 70

N/A 21.50 mm

21.5 X 2.5 U-70

N/A
138780

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 2.50 mm

N/A 70

N/A 21.50 mm

21.5 X 3 U-70

N/A
138781

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 3.00 mm

N/A 70

N/A 21.50 mm

21.5 X 4.5 U-70

N/A
138782

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 4.50 mm

N/A 70

N/A 21.50 mm

21.6 X 2.4 U-70

N/A
138784

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 2.40 mm

N/A 70

N/A 21.60 mm

210 X 3 U-70

N/A
138792

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 3.00 mm

N/A 70

N/A 210.00 mm

210 X 3.5 U-70

N/A
138793

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 3.50 mm

N/A 70

N/A 210.00 mm

210 X 4 U-70

N/A
138794

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 4.00 mm

N/A 70

N/A 210.00 mm

210 X 5 U-70

N/A
138795

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 5.00 mm

N/A 70

N/A 210.00 mm

210 X 6 U-70

N/A
138796

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 6.00 mm

N/A 70

N/A 210.00 mm

211 X 3 U-70

N/A
138797

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 3.00 mm

N/A 70

N/A 211.00 mm

211 X 3.5 U-70

N/A
138798

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 3.50 mm

N/A 70

N/A 211.00 mm

211 X 4 U-70

N/A
138799

N/A Metric Standard O-Ring

N/A Polyurethane

N/A

N/A 4.00 mm

N/A 70

N/A 211.00 mm