Monroe
OneMonroe
Locations Throughout the Country
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Tel: (877) 740-2007
Fax: (800) 453-9683
Email: sales@askmonroe.com
Website: monroeengineering.com
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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.

Metric O-Rings
Unit of Measure
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Item #

IntegrationID

Type

Material

Cross Reference

Cross Section Width

Durometer

Inside Diameter

Product Guides

Quantity
125 X 8.3 B-70 N/A
125011 		N/A Metric Standard O-Ring N/A Buna N/A N/A 8.30 mm N/A 70 N/A 125.00 mm N/A Seal Guides
125 X 8.3 B-90 N/A
125012 		N/A Metric Standard O-Ring N/A Buna N/A N/A 8.30 mm N/A 90 N/A 125.00 mm N/A Seal Guides
144.1 X 8.4 B-70 N/A
125013 		N/A Metric Standard O-Ring N/A Buna N/A N/A 8.40 mm N/A 70 N/A 144.10 mm N/A Seal Guides
144.1 X 8.4 B-90 N/A
125014 		N/A Metric Standard O-Ring N/A Buna N/A N/A 8.40 mm N/A 90 N/A 144.10 mm N/A Seal Guides
149.1 X 8.4 B-70 N/A
125015 		N/A Metric Standard O-Ring N/A Buna N/A N/A 8.40 mm N/A 70 N/A 149.10 mm N/A Seal Guides
149.1 X 8.4 B-90 N/A
125016 		N/A Metric Standard O-Ring N/A Buna N/A N/A 8.40 mm N/A 90 N/A 149.10 mm N/A Seal Guides
149.5 X 8.4 B-70 N/A
125017 		N/A Metric Standard O-Ring N/A Buna N/A P150A N/A 8.40 mm N/A 70 N/A 149.50 mm N/A Seal Guides
149.5 X 8.4 B-90 N/A
125018 		N/A Metric Standard O-Ring N/A Buna N/A P150A N/A 8.40 mm N/A 90 N/A 149.50 mm N/A Seal Guides
154.1 X 8.4 B-70 N/A
125019 		N/A Metric Standard O-Ring N/A Buna N/A N/A 8.40 mm N/A 70 N/A 154.10 mm N/A Seal Guides
154.1 X 8.4 B-90 N/A
125020 		N/A Metric Standard O-Ring N/A Buna N/A N/A 8.40 mm N/A 90 N/A 154.10 mm N/A Seal Guides
154.5 X 8.4 B-70 N/A
125021 		N/A Metric Standard O-Ring N/A Buna N/A P155 N/A 8.40 mm N/A 70 N/A 154.50 mm N/A Seal Guides
154.5 X 8.4 B-90 N/A
125022 		N/A Metric Standard O-Ring N/A Buna N/A P155 N/A 8.40 mm N/A 90 N/A 154.50 mm N/A Seal Guides
159.1 X 8.4 B-70 N/A
125023 		N/A Metric Standard O-Ring N/A Buna N/A N/A 8.40 mm N/A 70 N/A 159.10 mm N/A Seal Guides
159.1 X 8.4 B-90 N/A
125024 		N/A Metric Standard O-Ring N/A Buna N/A N/A 8.40 mm N/A 90 N/A 159.10 mm N/A Seal Guides
159.5 X 8.4 B-70 N/A
125025 		N/A Metric Standard O-Ring N/A Buna N/A P16I N/A 8.40 mm N/A 70 N/A 159.50 mm N/A Seal Guides
159.5 X 8.4 B-90 N/A
125026 		N/A Metric Standard O-Ring N/A Buna N/A P16I N/A 8.40 mm N/A 90 N/A 159.50 mm N/A Seal Guides
164.1 X 8.4 B-70 N/A
125027 		N/A Metric Standard O-Ring N/A Buna N/A N/A 8.40 mm N/A 70 N/A 164.10 mm N/A Seal Guides
164.1 X 8.4 B-90 N/A
125028 		N/A Metric Standard O-Ring N/A Buna N/A N/A 8.40 mm N/A 90 N/A 164.10 mm N/A Seal Guides
164.5 X 8.4 B-70 N/A
125029 		N/A Metric Standard O-Ring N/A Buna N/A P165 N/A 8.40 mm N/A 70 N/A 164.50 mm N/A Seal Guides
164.5 X 8.4 B-90 N/A
125030 		N/A Metric Standard O-Ring N/A Buna N/A P165 N/A 8.40 mm N/A 90 N/A 164.50 mm N/A Seal Guides
169.1 X 8.4 B-70 N/A
125031 		N/A Metric Standard O-Ring N/A Buna N/A N/A 8.40 mm N/A 70 N/A 169.10 mm N/A Seal Guides
169.1 X 8.4 B-90 N/A
125032 		N/A Metric Standard O-Ring N/A Buna N/A N/A 8.40 mm N/A 90 N/A 169.10 mm N/A Seal Guides
169.5 X 8.4 B-70 N/A
125033 		N/A Metric Standard O-Ring N/A Buna N/A P170 N/A 8.40 mm N/A 70 N/A 169.50 mm N/A Seal Guides
169.5 X 8.4 B-90 N/A
125034 		N/A Metric Standard O-Ring N/A Buna N/A P170 N/A 8.40 mm N/A 90 N/A 169.50 mm N/A Seal Guides
174.1 X 8.4 B-70 N/A
125035 		N/A Metric Standard O-Ring N/A Buna N/A N/A 8.40 mm N/A 70 N/A 174.10 mm N/A Seal Guides
Unit of Measure
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