Metric Buna O-Rings

OneMonroe’s Metric Buna O-Rings are engineered to provide reliable sealing performance across a variety of industrial and commercial applications. Made from high-quality Buna-N (Nitrile) rubber, these O-rings are known for their excellent resistance to oils, fuels, and other petroleum-based products, making them ideal for use in environments where durable, leak-proof seals are essential. Buna-N’s resilient properties allow it to maintain its integrity even in challenging temperatures, ranging from -40°F to 250°F, ensuring these O-rings can withstand both low and high-stress conditions with ease. With a broad range of metric sizes available, OneMonroe ensures you’ll find the right fit for your exact specifications.

Our Metric Buna O-Rings are crafted to offer outstanding resistance to abrasion and tearing, providing long-lasting performance in rigorous applications. This makes them well-suited for automotive, aerospace, marine, and hydraulic systems, as well as in general maintenance and repair settings. The unique chemical composition of Buna-N allows these O-rings to endure pressure and friction over extended periods without compromising their sealing capabilities, making them a reliable choice for static and dynamic sealing tasks. Each O-ring is manufactured to precise industry standards, ensuring a dependable fit and function in every installation.

With OneMonroe, you’re getting more than just a product; you’re receiving a commitment to quality and expertise. Our team is dedicated to supporting your projects with high-quality metric Buna O-Rings that meet both industry standards and specific customer requirements. We provide technical support to help you select the best O-ring for your application, offering detailed product specifications and guidance. Trust OneMonroe to deliver durable, efficient, and cost-effective sealing solutions tailored to meet the demands of your unique projects.

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
141 X 2.5 B-70	N/A 118831	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 141.00 mm
141 X 2.5 B-90	N/A 118832	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 141.00 mm
142x2.50B70	N/A 118833	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 142.00 mm
142 X 2.5 B-90	N/A 118834	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 142.00 mm
143 X 2.5 B-70	N/A 118835	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 143.00 mm
143 X 2.5 B-90	N/A 118836	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 143.00 mm
144x2.50B70	N/A 118837	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 144.00 mm
144 X 2.5 B-90	N/A 118838	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 144.00 mm
145x2.50B70	N/A 118839	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 145.00 mm
145 X 2.5 B-90	N/A 118840	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 145.00 mm
146x2.50B70	N/A 118841	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 146.00 mm
146 X 2.5 B-90	N/A 118842	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 146.00 mm
147x2.50B70	N/A 118843	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 147.00 mm
147 X 2.5 B-90	N/A 118844	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 147.00 mm
148x2.50B70	N/A 118845	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 148.00 mm
148 X 2.5 B-90	N/A 118846	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 148.00 mm
149x2.50B70	N/A 118847	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 149.00 mm
149 X 2.5 B-90	N/A 118848	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 149.00 mm
150x2.50B70	N/A 118849	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 150.00 mm
150 X 2.5 B-90	N/A 118850	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 150.00 mm
29.1 X 2.55 B-70	N/A 118851	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.55 mm	N/A 70	N/A 29.10 mm
29.1 X 2.55 B-90	N/A 118852	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.55 mm	N/A 90	N/A 29.10 mm
1.24 X 2.62 B-70	N/A 118853	N/A Metric Standard O-Ring	N/A Buna	N/A 102	N/A 2.62 mm	N/A 70	N/A 1.24 mm
1.24 X 2.62 B-90	N/A 118854	N/A Metric Standard O-Ring	N/A Buna	N/A 102	N/A 2.62 mm	N/A 90	N/A 1.24 mm
2.06 X 2.62 B-70	N/A 118855	N/A Metric Standard O-Ring	N/A Buna	N/A 103	N/A 2.62 mm	N/A 70	N/A 2.06 mm

N/A
118831

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 141.00 mm

141 X 2.5 B-90

N/A
118832

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 141.00 mm

142x2.50B70

N/A
118833

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 142.00 mm

142 X 2.5 B-90

N/A
118834

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 142.00 mm

143 X 2.5 B-70

N/A
118835

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 143.00 mm

143 X 2.5 B-90

N/A
118836

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 143.00 mm

144x2.50B70

N/A
118837

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 144.00 mm

144 X 2.5 B-90

N/A
118838

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 144.00 mm

145x2.50B70

N/A
118839

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 145.00 mm

145 X 2.5 B-90

N/A
118840

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 145.00 mm

146x2.50B70

N/A
118841

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 146.00 mm

146 X 2.5 B-90

N/A
118842

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 146.00 mm

147x2.50B70

N/A
118843

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 147.00 mm

147 X 2.5 B-90

N/A
118844

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 147.00 mm

148x2.50B70

N/A
118845

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 148.00 mm

148 X 2.5 B-90

N/A
118846

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 148.00 mm

149x2.50B70

N/A
118847

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 149.00 mm

149 X 2.5 B-90

N/A
118848

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 149.00 mm

150x2.50B70

N/A
118849

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 150.00 mm

150 X 2.5 B-90

N/A
118850

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 150.00 mm

29.1 X 2.55 B-70

N/A
118851

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.55 mm

N/A 70

N/A 29.10 mm

29.1 X 2.55 B-90

N/A
118852

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.55 mm

N/A 90

N/A 29.10 mm

1.24 X 2.62 B-70

N/A
118853

N/A Metric Standard O-Ring

N/A Buna

N/A 102

N/A 2.62 mm

N/A 70

N/A 1.24 mm

1.24 X 2.62 B-90

N/A
118854

N/A Metric Standard O-Ring

N/A Buna

N/A 102

N/A 2.62 mm

N/A 90

N/A 1.24 mm

2.06 X 2.62 B-70

N/A
118855

N/A Metric Standard O-Ring

N/A Buna

N/A 103

N/A 2.62 mm

N/A 70

N/A 2.06 mm