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
75 X 9 B-90	N/A 125136	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 90	N/A 75.00 mm	N/A Seal Guides
84 X 9 B-70	N/A 125137	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 70	N/A 84.00 mm	N/A Seal Guides
84 X 9 B-90	N/A 125138	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 90	N/A 84.00 mm	N/A Seal Guides
205 X 9 B-70	N/A 125139	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 70	N/A 205.00 mm	N/A Seal Guides
205 X 9 B-90	N/A 125140	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 90	N/A 205.00 mm	N/A Seal Guides
316 X 9 B-70	N/A 125141	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 70	N/A 316.00 mm	N/A Seal Guides
316 X 9 B-90	N/A 125142	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 90	N/A 316.00 mm	N/A Seal Guides
335 X 9 B-70	N/A 125143	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 70	N/A 335.00 mm	N/A Seal Guides
335 X 9 B-90	N/A 125144	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 90	N/A 335.00 mm	N/A Seal Guides
360 X 9 B-70	N/A 125145	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 70	N/A 360.00 mm	N/A Seal Guides
360 X 9 B-90	N/A 125146	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 90	N/A 360.00 mm	N/A Seal Guides
402 X 9 B-70	N/A 125147	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 70	N/A 402.00 mm	N/A Seal Guides
402 X 9 B-90	N/A 125148	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 90	N/A 402.00 mm	N/A Seal Guides
451 X 9 B-70	N/A 125149	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 70	N/A 451.00 mm	N/A Seal Guides
451 X 9 B-90	N/A 125150	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 90	N/A 451.00 mm	N/A Seal Guides
480 X 9 B-70	N/A 125151	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 70	N/A 480.00 mm	N/A Seal Guides
480 X 9 B-90	N/A 125152	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 90	N/A 480.00 mm	N/A Seal Guides
545 X 9 B-70	N/A 125153	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 70	N/A 545.00 mm	N/A Seal Guides
545 X 9 B-90	N/A 125154	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 9.00 mm	N/A 90	N/A 545.00 mm	N/A Seal Guides
35 X 10 B-70	N/A 125155	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 10.00 mm	N/A 70	N/A 35.00 mm	N/A Seal Guides
35 X 10 B-90	N/A 125156	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 10.00 mm	N/A 90	N/A 35.00 mm	N/A Seal Guides
38 X 10 B-70	N/A 125157	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 10.00 mm	N/A 70	N/A 38.00 mm	N/A Seal Guides
38 X 10 B-90	N/A 125158	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 10.00 mm	N/A 90	N/A 38.00 mm	N/A Seal Guides
92 X 10 B-70	N/A 125159	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 10.00 mm	N/A 70	N/A 92.00 mm	N/A Seal Guides
92 X 10 B-90	N/A 125160	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 10.00 mm	N/A 90	N/A 92.00 mm	N/A Seal Guides

N/A
125136

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 90

N/A 75.00 mm

N/A Seal Guides

84 X 9 B-70

N/A
125137

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 70

N/A 84.00 mm

N/A Seal Guides

84 X 9 B-90

N/A
125138

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 90

N/A 84.00 mm

N/A Seal Guides

205 X 9 B-70

N/A
125139

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 70

N/A 205.00 mm

N/A Seal Guides

205 X 9 B-90

N/A
125140

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 90

N/A 205.00 mm

N/A Seal Guides

316 X 9 B-70

N/A
125141

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 70

N/A 316.00 mm

N/A Seal Guides

316 X 9 B-90

N/A
125142

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 90

N/A 316.00 mm

N/A Seal Guides

335 X 9 B-70

N/A
125143

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 70

N/A 335.00 mm

N/A Seal Guides

335 X 9 B-90

N/A
125144

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 90

N/A 335.00 mm

N/A Seal Guides

360 X 9 B-70

N/A
125145

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 70

N/A 360.00 mm

N/A Seal Guides

360 X 9 B-90

N/A
125146

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 90

N/A 360.00 mm

N/A Seal Guides

402 X 9 B-70

N/A
125147

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 70

N/A 402.00 mm

N/A Seal Guides

402 X 9 B-90

N/A
125148

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 90

N/A 402.00 mm

N/A Seal Guides

451 X 9 B-70

N/A
125149

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 70

N/A 451.00 mm

N/A Seal Guides

451 X 9 B-90

N/A
125150

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 90

N/A 451.00 mm

N/A Seal Guides

480 X 9 B-70

N/A
125151

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 70

N/A 480.00 mm

N/A Seal Guides

480 X 9 B-90

N/A
125152

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 90

N/A 480.00 mm

N/A Seal Guides

545 X 9 B-70

N/A
125153

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 70

N/A 545.00 mm

N/A Seal Guides

545 X 9 B-90

N/A
125154

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 9.00 mm

N/A 90

N/A 545.00 mm

N/A Seal Guides

35 X 10 B-70

N/A
125155

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 10.00 mm

N/A 70

N/A 35.00 mm

N/A Seal Guides

35 X 10 B-90

N/A
125156

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 10.00 mm

N/A 90

N/A 35.00 mm

N/A Seal Guides

38 X 10 B-70

N/A
125157

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 10.00 mm

N/A 70

N/A 38.00 mm

N/A Seal Guides

38 X 10 B-90

N/A
125158

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 10.00 mm

N/A 90

N/A 38.00 mm

N/A Seal Guides

92 X 10 B-70

N/A
125159

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 10.00 mm

N/A 70

N/A 92.00 mm

N/A Seal Guides

92 X 10 B-90

N/A
125160

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 10.00 mm

N/A 90

N/A 92.00 mm

N/A Seal Guides