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
29.4 X 3.1 B-90 N/A
119866 		N/A Metric Standard O-Ring N/A Buna N/A G30 N/A 3.10 mm N/A 90 N/A 29.40 mm
34.4 X 3.1 B-70 N/A
119867 		N/A Metric Standard O-Ring N/A Buna N/A G35 N/A 3.10 mm N/A 70 N/A 34.40 mm
34.4 X 3.1 B-90 N/A
119868 		N/A Metric Standard O-Ring N/A Buna N/A G35 N/A 3.10 mm N/A 90 N/A 34.40 mm
39.4 X 3.1 B-70 N/A
119869 		N/A Metric Standard O-Ring N/A Buna N/A G40 N/A 3.10 mm N/A 70 N/A 39.40 mm
39.4 X 3.1 B-90 N/A
119870 		N/A Metric Standard O-Ring N/A Buna N/A G40 N/A 3.10 mm N/A 90 N/A 39.40 mm
44.4 X 3.1 B-70 N/A
119871 		N/A Metric Standard O-Ring N/A Buna N/A G45 N/A 3.10 mm N/A 70 N/A 44.40 mm
44.4 X 3.1 B-90 N/A
119872 		N/A Metric Standard O-Ring N/A Buna N/A G45 N/A 3.10 mm N/A 90 N/A 44.40 mm
49.4 X 3.1 B-70 N/A
119873 		N/A Metric Standard O-Ring N/A Buna N/A G50 N/A 3.10 mm N/A 70 N/A 49.40 mm
49.4 X 3.1 B-90 N/A
119874 		N/A Metric Standard O-Ring N/A Buna N/A G50 N/A 3.10 mm N/A 90 N/A 49.40 mm
54.4 X 3.1 B-70 N/A
119875 		N/A Metric Standard O-Ring N/A Buna N/A G55 N/A 3.10 mm N/A 70 N/A 54.40 mm
54.4 X 3.1 B-90 N/A
119876 		N/A Metric Standard O-Ring N/A Buna N/A G55 N/A 3.10 mm N/A 90 N/A 54.40 mm
59.4 X 3.1 B-70 N/A
119877 		N/A Metric Standard O-Ring N/A Buna N/A G60 N/A 3.10 mm N/A 70 N/A 59.40 mm
59.4 X 3.1 B-90 N/A
119878 		N/A Metric Standard O-Ring N/A Buna N/A G60 N/A 3.10 mm N/A 90 N/A 59.40 mm
64.4 X 3.1 B-70 N/A
119879 		N/A Metric Standard O-Ring N/A Buna N/A G65 N/A 3.10 mm N/A 70 N/A 64.40 mm
64.4 X 3.1 B-90 N/A
119880 		N/A Metric Standard O-Ring N/A Buna N/A G65 N/A 3.10 mm N/A 90 N/A 64.40 mm
69.4 X 3.1 B-70 N/A
119881 		N/A Metric Standard O-Ring N/A Buna N/A G70 N/A 3.10 mm N/A 70 N/A 69.40 mm
69.4 X 3.1 B-90 N/A
119882 		N/A Metric Standard O-Ring N/A Buna N/A G70 N/A 3.10 mm N/A 90 N/A 69.40 mm
74.4 X 3.1 B-70 N/A
119883 		N/A Metric Standard O-Ring N/A Buna N/A G75 N/A 3.10 mm N/A 70 N/A 74.40 mm
74.4 X 3.1 B-90 N/A
119884 		N/A Metric Standard O-Ring N/A Buna N/A G75 N/A 3.10 mm N/A 90 N/A 74.40 mm
79.4 X 3.1 B-70 N/A
119885 		N/A Metric Standard O-Ring N/A Buna N/A G80 N/A 3.10 mm N/A 70 N/A 79.40 mm
79.4 X 3.1 B-90 N/A
119886 		N/A Metric Standard O-Ring N/A Buna N/A G80 N/A 3.10 mm N/A 90 N/A 79.40 mm
84.4 X 3.1 B-70 N/A
119887 		N/A Metric Standard O-Ring N/A Buna N/A G85 N/A 3.10 mm N/A 70 N/A 84.40 mm
84.4 X 3.1 B-90 N/A
119888 		N/A Metric Standard O-Ring N/A Buna N/A G85 N/A 3.10 mm N/A 90 N/A 84.40 mm
89.4 X 3.1 B-70 N/A
119889 		N/A Metric Standard O-Ring N/A Buna N/A G90 N/A 3.10 mm N/A 70 N/A 89.40 mm
89.4 X 3.1 B-90 N/A
119890 		N/A Metric Standard O-Ring N/A Buna N/A G90 N/A 3.10 mm N/A 90 N/A 89.40 mm
Unit of Measure
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