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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
123.19 X 6.99 B-70 N/A
124661
N/A Metric Standard O-Ring N/A Buna N/A 428 N/A 6.99 mm N/A 70 N/A 123.19 mm N/A Seal Guides
123.19 X 6.99 B-90 N/A
124662
N/A Metric Standard O-Ring N/A Buna N/A 428 N/A 6.99 mm N/A 90 N/A 123.19 mm N/A Seal Guides
124.6 X 6.99 B-70 N/A
124663
N/A Metric Standard O-Ring N/A Buna N/A BS625 N/A 6.99 mm N/A 70 N/A 124.60 mm N/A Seal Guides
124.6 X 6.99 B-90 N/A
124664
N/A Metric Standard O-Ring N/A Buna N/A BS625 N/A 6.99 mm N/A 90 N/A 124.60 mm N/A Seal Guides
126.37 X 6.99 B-70 N/A
124665
N/A Metric Standard O-Ring N/A Buna N/A 429 N/A 6.99 mm N/A 70 N/A 126.37 mm N/A Seal Guides
126.37 X 6.99 B-90 N/A
124666
N/A Metric Standard O-Ring N/A Buna N/A 429 N/A 6.99 mm N/A 90 N/A 126.37 mm N/A Seal Guides
129.54 X 6.99 B-70 N/A
124667
N/A Metric Standard O-Ring N/A Buna N/A 430 N/A 6.99 mm N/A 70 N/A 129.54 mm N/A Seal Guides
129.54 X 6.99 B-90 N/A
124668
N/A Metric Standard O-Ring N/A Buna N/A 430 N/A 6.99 mm N/A 90 N/A 129.54 mm N/A Seal Guides
132.72 X 6.99 B-70 N/A
124669
N/A Metric Standard O-Ring N/A Buna N/A 431 N/A 6.99 mm N/A 70 N/A 132.72 mm N/A Seal Guides
132.72 X 6.99 B-90 N/A
124670
N/A Metric Standard O-Ring N/A Buna N/A 431 N/A 6.99 mm N/A 90 N/A 132.72 mm N/A Seal Guides
134.5 X 6.99 B-70 N/A
124671
N/A Metric Standard O-Ring N/A Buna N/A BS626 N/A 6.99 mm N/A 70 N/A 134.50 mm N/A Seal Guides
134.5 X 6.99 B-90 N/A
124672
N/A Metric Standard O-Ring N/A Buna N/A BS626 N/A 6.99 mm N/A 90 N/A 134.50 mm N/A Seal Guides
135.89 X 6.99 B-70 N/A
124673
N/A Metric Standard O-Ring N/A Buna N/A 432 N/A 6.99 mm N/A 70 N/A 135.89 mm N/A Seal Guides
135.89 X 6.99 B-90 N/A
124674
N/A Metric Standard O-Ring N/A Buna N/A 432 N/A 6.99 mm N/A 90 N/A 135.89 mm N/A Seal Guides
139.07 X 6.99 B-70 N/A
124675
N/A Metric Standard O-Ring N/A Buna N/A 433 N/A 6.99 mm N/A 70 N/A 139.07 mm N/A Seal Guides
139.07 X 6.99 B-90 N/A
124676
N/A Metric Standard O-Ring N/A Buna N/A 433 N/A 6.99 mm N/A 90 N/A 139.07 mm N/A Seal Guides
142.24 X 6.99 B-70 N/A
124677
N/A Metric Standard O-Ring N/A Buna N/A 434 N/A 6.99 mm N/A 70 N/A 142.24 mm N/A Seal Guides
142.24 X 6.99 B-90 N/A
124678
N/A Metric Standard O-Ring N/A Buna N/A 434 N/A 6.99 mm N/A 90 N/A 142.24 mm N/A Seal Guides
145.42 X 6.99 B-70 N/A
124679
N/A Metric Standard O-Ring N/A Buna N/A 435 N/A 6.99 mm N/A 70 N/A 145.42 mm N/A Seal Guides
145.42 X 6.99 B-90 N/A
124680
N/A Metric Standard O-Ring N/A Buna N/A 435 N/A 6.99 mm N/A 90 N/A 145.42 mm N/A Seal Guides
148.59 X 6.99 B-70 N/A
124681
N/A Metric Standard O-Ring N/A Buna N/A 436 N/A 6.99 mm N/A 70 N/A 148.59 mm N/A Seal Guides
148.59 X 6.99 B-90 N/A
124682
N/A Metric Standard O-Ring N/A Buna N/A 436 N/A 6.99 mm N/A 90 N/A 148.59 mm N/A Seal Guides
151.77 X 6.99 B-70 N/A
124683
N/A Metric Standard O-Ring N/A Buna N/A 437 N/A 6.99 mm N/A 70 N/A 151.77 mm N/A Seal Guides
151.77 X 6.99 B-90 N/A
124684
N/A Metric Standard O-Ring N/A Buna N/A 437 N/A 6.99 mm N/A 90 N/A 151.77 mm N/A Seal Guides
155.6 X 6.99 B-70 N/A
124685
N/A Metric Standard O-Ring N/A Buna N/A BS8 72 N/A 6.99 mm N/A 70 N/A 155.60 mm N/A Seal Guides
Unit of Measure
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