Metric Buna O-Rings

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.

Item #	IntegrationID	Type	Material	Cross Reference	Cross Section Width	Durometer	Inside Diameter
167.51 X 1.78 B-90	N/A 117796	N/A Metric Standard O-Ring	N/A Buna	N/A BS560	N/A 1.78 mm	N/A 90	N/A 167.51 mm
170.69 X 1.78 B-70	N/A 117797	N/A Metric Standard O-Ring	N/A Buna	N/A BS561	N/A 1.78 mm	N/A 70	N/A 170.69 mm
170.69 X 1.78 B-90	N/A 117798	N/A Metric Standard O-Ring	N/A Buna	N/A BS561	N/A 1.78 mm	N/A 90	N/A 170.69 mm
173.87 X 1.78 B-70	N/A 117799	N/A Metric Standard O-Ring	N/A Buna	N/A BS562	N/A 1.78 mm	N/A 70	N/A 173.87 mm
173.87 X 1.78 B-90	N/A 117800	N/A Metric Standard O-Ring	N/A Buna	N/A BS562	N/A 1.78 mm	N/A 90	N/A 173.87 mm
1.8 X 1.8 B-70	N/A 117801	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 70	N/A 1.80 mm
1.8 X 1.8 B-90	N/A 117802	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 90	N/A 1.80 mm
2 X 1.8 B-70	N/A 117803	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 70	N/A 2.00 mm
2 X 1.8 B-90	N/A 117804	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 90	N/A 2.00 mm
2.24x1.80B70	N/A 117805	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 70	N/A 2.24 mm
2.24 X 1.8 B-90	N/A 117806	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 90	N/A 2.24 mm
2.5 X 1.8 B-70	N/A 117807	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 70	N/A 2.50 mm
2.5 X 1.8 B-90	N/A 117808	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 90	N/A 2.50 mm
2.8x1.80B70	N/A 117809	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 70	N/A 2.80 mm
2.8 X 1.8 B-90	N/A 117810	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 90	N/A 2.80 mm
3.15x1.80B70	N/A 117811	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 70	N/A 3.15 mm
3.15 X 1.8 B-90	N/A 117812	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 90	N/A 3.15 mm
3.55x1.80B70	N/A 117813	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 70	N/A 3.55 mm
3.55 X 1.8 B-90	N/A 117814	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 90	N/A 3.55 mm
3.75x1.80B70	N/A 117815	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 70	N/A 3.75 mm
3.75 X 1.8 B-90	N/A 117816	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 90	N/A 3.75 mm
4x1.80B70	N/A 117817	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 70	N/A 4.00 mm
4 X 1.8 B-90	N/A 117818	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 90	N/A 4.00 mm
4.5x1.80B70	N/A 117819	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 70	N/A 4.50 mm
4.5 X 1.8 B-90	N/A 117820	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.80 mm	N/A 90	N/A 4.50 mm

N/A
117796

N/A Metric Standard O-Ring

N/A Buna

N/A BS560

N/A 1.78 mm

N/A 90

N/A 167.51 mm

170.69 X 1.78 B-70

N/A
117797

N/A Metric Standard O-Ring

N/A Buna

N/A BS561

N/A 1.78 mm

N/A 70

N/A 170.69 mm

170.69 X 1.78 B-90

N/A
117798

N/A Metric Standard O-Ring

N/A Buna

N/A BS561

N/A 1.78 mm

N/A 90

N/A 170.69 mm

173.87 X 1.78 B-70

N/A
117799

N/A Metric Standard O-Ring

N/A Buna

N/A BS562

N/A 1.78 mm

N/A 70

N/A 173.87 mm

173.87 X 1.78 B-90

N/A
117800

N/A Metric Standard O-Ring

N/A Buna

N/A BS562

N/A 1.78 mm

N/A 90

N/A 173.87 mm

1.8 X 1.8 B-70

N/A
117801

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 70

N/A 1.80 mm

1.8 X 1.8 B-90

N/A
117802

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 90

N/A 1.80 mm

2 X 1.8 B-70

N/A
117803

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 70

N/A 2.00 mm

2 X 1.8 B-90

N/A
117804

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 90

N/A 2.00 mm

2.24x1.80B70

N/A
117805

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 70

N/A 2.24 mm

2.24 X 1.8 B-90

N/A
117806

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 90

N/A 2.24 mm

2.5 X 1.8 B-70

N/A
117807

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 70

N/A 2.50 mm

2.5 X 1.8 B-90

N/A
117808

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 90

N/A 2.50 mm

2.8x1.80B70

N/A
117809

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 70

N/A 2.80 mm

2.8 X 1.8 B-90

N/A
117810

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 90

N/A 2.80 mm

3.15x1.80B70

N/A
117811

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 70

N/A 3.15 mm

3.15 X 1.8 B-90

N/A
117812

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 90

N/A 3.15 mm

3.55x1.80B70

N/A
117813

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 70

N/A 3.55 mm

3.55 X 1.8 B-90

N/A
117814

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 90

N/A 3.55 mm

3.75x1.80B70

N/A
117815

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 70

N/A 3.75 mm

3.75 X 1.8 B-90

N/A
117816

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 90

N/A 3.75 mm

4x1.80B70

N/A
117817

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 70

N/A 4.00 mm

4 X 1.8 B-90

N/A
117818

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 90

N/A 4.00 mm

4.5x1.80B70

N/A
117819

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 70

N/A 4.50 mm

4.5 X 1.8 B-90

N/A
117820

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.80 mm

N/A 90

N/A 4.50 mm