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
50.52 X 1.78 B-70 N/A
117721 		N/A Metric Standard O-Ring N/A Buna N/A 33 N/A 1.78 mm N/A 70 N/A 50.52 mm N/A Seal Guides
50.52 X 1.78 B-90 N/A
117722 		N/A Metric Standard O-Ring N/A Buna N/A 33 N/A 1.78 mm N/A 90 N/A 50.52 mm N/A Seal Guides
53.7 X 1.78 B-70 N/A
117723 		N/A Metric Standard O-Ring N/A Buna N/A 34 N/A 1.78 mm N/A 70 N/A 53.70 mm N/A Seal Guides
53.7 X 1.78 B-90 N/A
117724 		N/A Metric Standard O-Ring N/A Buna N/A 34 N/A 1.78 mm N/A 90 N/A 53.70 mm N/A Seal Guides
56.87 X 1.78 B-70 N/A
117725 		N/A Metric Standard O-Ring N/A Buna N/A 35 N/A 1.78 mm N/A 70 N/A 56.87 mm N/A Seal Guides
56.87 X 1.78 B-90 N/A
117726 		N/A Metric Standard O-Ring N/A Buna N/A 35 N/A 1.78 mm N/A 90 N/A 56.87 mm N/A Seal Guides
60.05 X 1.78 B-70 N/A
117727 		N/A Metric Standard O-Ring N/A Buna N/A 36 N/A 1.78 mm N/A 70 N/A 60.05 mm N/A Seal Guides
60.05 X 1.78 B-90 N/A
117728 		N/A Metric Standard O-Ring N/A Buna N/A 36 N/A 1.78 mm N/A 90 N/A 60.05 mm N/A Seal Guides
63.22 X 1.78 B-70 N/A
117729 		N/A Metric Standard O-Ring N/A Buna N/A 37 N/A 1.78 mm N/A 70 N/A 63.22 mm N/A Seal Guides
63.22 X 1.78 B-90 N/A
117730 		N/A Metric Standard O-Ring N/A Buna N/A 37 N/A 1.78 mm N/A 90 N/A 63.22 mm N/A Seal Guides
66.4 X 1.78 B-70 N/A
117731 		N/A Metric Standard O-Ring N/A Buna N/A 38 N/A 1.78 mm N/A 70 N/A 66.40 mm N/A Seal Guides
66.4 X 1.78 B-90 N/A
117732 		N/A Metric Standard O-Ring N/A Buna N/A 38 N/A 1.78 mm N/A 90 N/A 66.40 mm N/A Seal Guides
69.57 X 1.78 B-70 N/A
117733 		N/A Metric Standard O-Ring N/A Buna N/A 39 N/A 1.78 mm N/A 70 N/A 69.57 mm N/A Seal Guides
69.57 X 1.78 B-90 N/A
117734 		N/A Metric Standard O-Ring N/A Buna N/A 39 N/A 1.78 mm N/A 90 N/A 69.57 mm N/A Seal Guides
72.75 X 1.78 B-70 N/A
117735 		N/A Metric Standard O-Ring N/A Buna N/A 40 N/A 1.78 mm N/A 70 N/A 72.75 mm N/A Seal Guides
72.75 X 1.78 B-90 N/A
117736 		N/A Metric Standard O-Ring N/A Buna N/A 40 N/A 1.78 mm N/A 90 N/A 72.75 mm N/A Seal Guides
75.92 X 1.78 B-70 N/A
117737 		N/A Metric Standard O-Ring N/A Buna N/A 41 N/A 1.78 mm N/A 70 N/A 75.92 mm N/A Seal Guides
75.92 X 1.78 B-90 N/A
117738 		N/A Metric Standard O-Ring N/A Buna N/A 41 N/A 1.78 mm N/A 90 N/A 75.92 mm N/A Seal Guides
79 X 1.78 B-70 N/A
117739 		N/A Metric Standard O-Ring N/A Buna N/A BS532 N/A 1.78 mm N/A 70 N/A 79.00 mm N/A Seal Guides
79 X 1.78 B-90 N/A
117740 		N/A Metric Standard O-Ring N/A Buna N/A BS532 N/A 1.78 mm N/A 90 N/A 79.00 mm N/A Seal Guides
82.27 X 1.78 B-70 N/A
117741 		N/A Metric Standard O-Ring N/A Buna N/A 42 N/A 1.78 mm N/A 70 N/A 82.27 mm N/A Seal Guides
82.27 X 1.78 B-90 N/A
117742 		N/A Metric Standard O-Ring N/A Buna N/A 42 N/A 1.78 mm N/A 90 N/A 82.27 mm N/A Seal Guides
85.34 X 1.78 B-70 N/A
117743 		N/A Metric Standard O-Ring N/A Buna N/A BS534 N/A 1.78 mm N/A 70 N/A 85.34 mm N/A Seal Guides
85.34 X 1.78 B-90 N/A
117744 		N/A Metric Standard O-Ring N/A Buna N/A BS534 N/A 1.78 mm N/A 90 N/A 85.34 mm N/A Seal Guides
88.62 X 1.78 B-70 N/A
117745 		N/A Metric Standard O-Ring N/A Buna N/A 43 N/A 1.78 mm N/A 70 N/A 88.62 mm N/A Seal Guides
Unit of Measure
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