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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
155.6 X 6.99 B-90 N/A
124686
N/A Metric Standard O-Ring N/A Buna N/A BS8 72 N/A 6.99 mm N/A 90 N/A 155.60 mm N/A Seal Guides
158.12 X 6.99 B-70 N/A
124687
N/A Metric Standard O-Ring N/A Buna N/A 438 N/A 6.99 mm N/A 70 N/A 158.12 mm N/A Seal Guides
158.12 X 6.99 B-90 N/A
124688
N/A Metric Standard O-Ring N/A Buna N/A 438 N/A 6.99 mm N/A 90 N/A 158.12 mm N/A Seal Guides
159.5 X 6.99 B-70 N/A
124689
N/A Metric Standard O-Ring N/A Buna N/A BS627 N/A 6.99 mm N/A 70 N/A 159.50 mm N/A Seal Guides
159.5 X 6.99 B-90 N/A
124690
N/A Metric Standard O-Ring N/A Buna N/A BS627 N/A 6.99 mm N/A 90 N/A 159.50 mm N/A Seal Guides
161.9 X 6.99 B-70 N/A
124691
N/A Metric Standard O-Ring N/A Buna N/A BS874 N/A 6.99 mm N/A 70 N/A 161.90 mm N/A Seal Guides
161.9 X 6.99 B-90 N/A
124692
N/A Metric Standard O-Ring N/A Buna N/A BS874 N/A 6.99 mm N/A 90 N/A 161.90 mm N/A Seal Guides
164.47 X 6.99 B-70 N/A
124693
N/A Metric Standard O-Ring N/A Buna N/A 439 N/A 6.99 mm N/A 70 N/A 164.47 mm N/A Seal Guides
164.47 X 6.99 B-90 N/A
124694
N/A Metric Standard O-Ring N/A Buna N/A 439 N/A 6.99 mm N/A 90 N/A 164.47 mm N/A Seal Guides
166.7 X 6.99 B-70 N/A
124695
N/A Metric Standard O-Ring N/A Buna N/A BS628 N/A 6.99 mm N/A 70 N/A 166.70 mm N/A Seal Guides
166.7 X 6.99 B-90 N/A
124696
N/A Metric Standard O-Ring N/A Buna N/A BS628 N/A 6.99 mm N/A 90 N/A 166.70 mm N/A Seal Guides
168.3 X 6.99 B-70 N/A
124697
N/A Metric Standard O-Ring N/A Buna N/A BS876 N/A 6.99 mm N/A 70 N/A 168.30 mm N/A Seal Guides
168.3 X 6.99 B-90 N/A
124698
N/A Metric Standard O-Ring N/A Buna N/A BS876 N/A 6.99 mm N/A 90 N/A 168.30 mm N/A Seal Guides
170.82 X 6.99 B-70 N/A
124699
N/A Metric Standard O-Ring N/A Buna N/A 440 N/A 6.99 mm N/A 70 N/A 170.82 mm N/A Seal Guides
170.82 X 6.99 B-90 N/A
124700
N/A Metric Standard O-Ring N/A Buna N/A 440 N/A 6.99 mm N/A 90 N/A 170.82 mm N/A Seal Guides
174.6 X 6.99 B-70 N/A
124701
N/A Metric Standard O-Ring N/A Buna N/A BS878 N/A 6.99 mm N/A 70 N/A 174.60 mm N/A Seal Guides
174.6 X 6.99 B-90 N/A
124702
N/A Metric Standard O-Ring N/A Buna N/A BS878 N/A 6.99 mm N/A 90 N/A 174.60 mm N/A Seal Guides
177.17 X 6.99 B-70 N/A
124703
N/A Metric Standard O-Ring N/A Buna N/A 441 N/A 6.99 mm N/A 70 N/A 177.17 mm N/A Seal Guides
177.17 X 6.99 B-90 N/A
124704
N/A Metric Standard O-Ring N/A Buna N/A 441 N/A 6.99 mm N/A 90 N/A 177.17 mm N/A Seal Guides
181 X 6.99 B-70 N/A
124705
N/A Metric Standard O-Ring N/A Buna N/A BS880 N/A 6.99 mm N/A 70 N/A 181.00 mm N/A Seal Guides
181 X 6.99 B-90 N/A
124706
N/A Metric Standard O-Ring N/A Buna N/A BS880 N/A 6.99 mm N/A 90 N/A 181.00 mm N/A Seal Guides
183.52 X 6.99 B-70 N/A
124707
N/A Metric Standard O-Ring N/A Buna N/A 442 N/A 6.99 mm N/A 70 N/A 183.52 mm N/A Seal Guides
183.52 X 6.99 B-90 N/A
124708
N/A Metric Standard O-Ring N/A Buna N/A 442 N/A 6.99 mm N/A 90 N/A 183.52 mm N/A Seal Guides
187.3 X 6.99 B-70 N/A
124709
N/A Metric Standard O-Ring N/A Buna N/A BS882 N/A 6.99 mm N/A 70 N/A 187.30 mm N/A Seal Guides
187.3 X 6.99 B-90 N/A
124710
N/A Metric Standard O-Ring N/A Buna N/A BS882 N/A 6.99 mm N/A 90 N/A 187.30 mm N/A Seal Guides
Unit of Measure
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