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

Quantity
36.09 X 3.53 B-70 N/A
120893 		N/A Metric Standard O-Ring N/A Buna N/A 221 N/A 3.53 mm N/A 70 N/A 36.09 mm
36.09 X 3.53 B-90 N/A
120894 		N/A Metric Standard O-Ring N/A Buna N/A 221 N/A 3.53 mm N/A 90 N/A 36.09 mm
37.69 X 3.53 B-70 N/A
120895 		N/A Metric Standard O-Ring N/A Buna N/A 222 N/A 3.53 mm N/A 70 N/A 37.69 mm
37.69 X 3.53 B-90 N/A
120896 		N/A Metric Standard O-Ring N/A Buna N/A 222 N/A 3.53 mm N/A 90 N/A 37.69 mm
39.7x3.53B70 N/A
120897 		N/A Metric Standard O-Ring N/A Buna N/A BS824 N/A 3.53 mm N/A 70 N/A 39.70 mm
39.7 X 3.53 B-90 N/A
120898 		N/A Metric Standard O-Ring N/A Buna N/A BS824 N/A 3.53 mm N/A 90 N/A 39.70 mm
40.87 X 3.53 B-70 N/A
120899 		N/A Metric Standard O-Ring N/A Buna N/A 223 N/A 3.53 mm N/A 70 N/A 40.87 mm
40.87 X 3.53 B-90 N/A
120900 		N/A Metric Standard O-Ring N/A Buna N/A 223 N/A 3.53 mm N/A 90 N/A 40.87 mm
41.26 X 3.53 B-70 N/A
120901 		N/A Metric Standard O-Ring N/A Buna N/A BSW825 N/A 3.53 mm N/A 70 N/A 41.26 mm
41.26 X 3.53 B-90 N/A
120902 		N/A Metric Standard O-Ring N/A Buna N/A BSW825 N/A 3.53 mm N/A 90 N/A 41.26 mm
41.28 X 3.53 B-70 N/A
120903 		N/A Metric Standard O-Ring N/A Buna N/A BS825 N/A 3.53 mm N/A 70 N/A 41.28 mm
41.28 X 3.53 B-90 N/A
120904 		N/A Metric Standard O-Ring N/A Buna N/A BS825 N/A 3.53 mm N/A 90 N/A 41.28 mm
42.86 X 3.53 B-70 N/A
120905 		N/A Metric Standard O-Ring N/A Buna N/A BS826 N/A 3.53 mm N/A 70 N/A 42.86 mm
42.86 X 3.53 B-90 N/A
120906 		N/A Metric Standard O-Ring N/A Buna N/A BS826 N/A 3.53 mm N/A 90 N/A 42.86 mm
44.04 X 3.53 B-70 N/A
120907 		N/A Metric Standard O-Ring N/A Buna N/A 224 N/A 3.53 mm N/A 70 N/A 44.04 mm
44.04 X 3.53 B-90 N/A
120908 		N/A Metric Standard O-Ring N/A Buna N/A 224 N/A 3.53 mm N/A 90 N/A 44.04 mm
44.45 X 3.53 B-70 N/A
120909 		N/A Metric Standard O-Ring N/A Buna N/A BS827 N/A 3.53 mm N/A 70 N/A 44.45 mm
44.45 X 3.53 B-90 N/A
120910 		N/A Metric Standard O-Ring N/A Buna N/A BS827 N/A 3.53 mm N/A 90 N/A 44.45 mm
46.04 X 3.53 B-70 N/A
120911 		N/A Metric Standard O-Ring N/A Buna N/A BS828 N/A 3.53 mm N/A 70 N/A 46.04 mm
46.04 X 3.53 B-90 N/A
120912 		N/A Metric Standard O-Ring N/A Buna N/A BS828 N/A 3.53 mm N/A 90 N/A 46.04 mm
47.22 X 3.53 B-70 N/A
120913 		N/A Metric Standard O-Ring N/A Buna N/A 225 N/A 3.53 mm N/A 70 N/A 47.22 mm
47.22 X 3.53 B-90 N/A
120914 		N/A Metric Standard O-Ring N/A Buna N/A 225 N/A 3.53 mm N/A 90 N/A 47.22 mm
47.62 X 3.53 B-70 N/A
120915 		N/A Metric Standard O-Ring N/A Buna N/A BS829 N/A 3.53 mm N/A 70 N/A 47.62 mm
47.62 X 3.53 B-90 N/A
120916 		N/A Metric Standard O-Ring N/A Buna N/A BS829 N/A 3.53 mm N/A 90 N/A 47.62 mm
49.2x3.53B70 N/A
120917 		N/A Metric Standard O-Ring N/A Buna N/A BS830 N/A 3.53 mm N/A 70 N/A 49.20 mm
Unit of Measure
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