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	Product Guides
2.7 X 1 B-90	N/A 117096	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 2.70 mm	N/A Seal Guides
3 X 1 B-70	N/A 117097	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 3.00 mm	N/A Seal Guides
3 X 1 B-90	N/A 117098	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 3.00 mm	N/A Seal Guides
3.3 X 1 B-70	N/A 117099	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 3.30 mm	N/A Seal Guides
3.3 X 1 B-90	N/A 117100	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 3.30 mm	N/A Seal Guides
3.5 X 1 B-70	N/A 117101	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 3.50 mm	N/A Seal Guides
3.5 X 1 B-90	N/A 117102	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 3.50 mm	N/A Seal Guides
4 X 1 B-70	N/A 117103	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 4.00 mm	N/A Seal Guides
4 X 1 B-90	N/A 117104	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 4.00 mm	N/A Seal Guides
4.5 X 1 B-70	N/A 117105	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 4.50 mm	N/A Seal Guides
4.5 X 1 B-90	N/A 117106	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 4.50 mm	N/A Seal Guides
5 X 1 B-70	N/A 117107	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 5.00 mm	N/A Seal Guides
5 X 1 B-90	N/A 117108	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 5.00 mm	N/A Seal Guides
5.5 X 1 B-70	N/A 117109	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 5.50 mm	N/A Seal Guides
5.5 X 1 B-90	N/A 117110	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 5.50 mm	N/A Seal Guides
6 X 1 B-70	N/A 117111	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 6.00 mm	N/A Seal Guides
6 X 1 B-90	N/A 117112	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 6.00 mm	N/A Seal Guides
6.5 X 1 B-70	N/A 117113	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 6.50 mm	N/A Seal Guides
6.5 X 1 B-90	N/A 117114	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 6.50 mm	N/A Seal Guides
7X1.00B70	N/A 117115	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 7.00 mm	N/A Seal Guides
7 X 1 B-90	N/A 117116	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 7.00 mm	N/A Seal Guides
7.2 X 1 B-70	N/A 117117	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 7.20 mm	N/A Seal Guides
7.2 X 1 B-90	N/A 117118	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 7.20 mm	N/A Seal Guides
7.5 X 1 B-70	N/A 117119	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 7.50 mm	N/A Seal Guides
7.5 X 1 B-90	N/A 117120	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 7.50 mm	N/A Seal Guides

N/A
117096

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 2.70 mm

N/A Seal Guides

3 X 1 B-70

N/A
117097

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 3.00 mm

N/A Seal Guides

3 X 1 B-90

N/A
117098

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 3.00 mm

N/A Seal Guides

3.3 X 1 B-70

N/A
117099

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 3.30 mm

N/A Seal Guides

3.3 X 1 B-90

N/A
117100

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 3.30 mm

N/A Seal Guides

3.5 X 1 B-70

N/A
117101

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 3.50 mm

N/A Seal Guides

3.5 X 1 B-90

N/A
117102

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 3.50 mm

N/A Seal Guides

4 X 1 B-70

N/A
117103

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 4.00 mm

N/A Seal Guides

4 X 1 B-90

N/A
117104

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 4.00 mm

N/A Seal Guides

4.5 X 1 B-70

N/A
117105

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 4.50 mm

N/A Seal Guides

4.5 X 1 B-90

N/A
117106

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 4.50 mm

N/A Seal Guides

5 X 1 B-70

N/A
117107

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 5.00 mm

N/A Seal Guides

5 X 1 B-90

N/A
117108

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 5.00 mm

N/A Seal Guides

5.5 X 1 B-70

N/A
117109

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 5.50 mm

N/A Seal Guides

5.5 X 1 B-90

N/A
117110

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 5.50 mm

N/A Seal Guides

6 X 1 B-70

N/A
117111

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 6.00 mm

N/A Seal Guides

6 X 1 B-90

N/A
117112

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 6.00 mm

N/A Seal Guides

6.5 X 1 B-70

N/A
117113

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 6.50 mm

N/A Seal Guides

6.5 X 1 B-90

N/A
117114

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 6.50 mm

N/A Seal Guides

7X1.00B70

N/A
117115

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 7.00 mm

N/A Seal Guides

7 X 1 B-90

N/A
117116

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 7.00 mm

N/A Seal Guides

7.2 X 1 B-70

N/A
117117

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 7.20 mm

N/A Seal Guides

7.2 X 1 B-90

N/A
117118

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 7.20 mm

N/A Seal Guides

7.5 X 1 B-70

N/A
117119

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 7.50 mm

N/A Seal Guides

7.5 X 1 B-90

N/A
117120

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 7.50 mm

N/A Seal Guides