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
324 X 5 B-90	N/A 123178	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 324.00 mm	N/A Seal Guides
325x5.00B70	N/A 123179	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 325.00 mm	N/A Seal Guides
325 X 5 B-90	N/A 123180	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 325.00 mm	N/A Seal Guides
326 X 5 B-70	N/A 123181	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 326.00 mm	N/A Seal Guides
326 X 5 B-90	N/A 123182	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 326.00 mm	N/A Seal Guides
327 X 5 B-70	N/A 123183	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 327.00 mm	N/A Seal Guides
327 X 5 B-90	N/A 123184	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 327.00 mm	N/A Seal Guides
328 X 5 B-70	N/A 123185	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 328.00 mm	N/A Seal Guides
328 X 5 B-90	N/A 123186	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 328.00 mm	N/A Seal Guides
329 X 5 B-70	N/A 123187	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 329.00 mm	N/A Seal Guides
329 X 5 B-90	N/A 123188	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 329.00 mm	N/A Seal Guides
330x5.00B70	N/A 123189	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 330.00 mm	N/A Seal Guides
330 X 5 B-90	N/A 123190	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 330.00 mm	N/A Seal Guides
331 X 5 B-70	N/A 123191	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 331.00 mm	N/A Seal Guides
331 X 5 B-90	N/A 123192	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 331.00 mm	N/A Seal Guides
332 X 5 B-70	N/A 123193	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 332.00 mm	N/A Seal Guides
332 X 5 B-90	N/A 123194	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 332.00 mm	N/A Seal Guides
333 X 5 B-70	N/A 123195	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 333.00 mm	N/A Seal Guides
333 X 5 B-90	N/A 123196	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 333.00 mm	N/A Seal Guides
334 X 5 B-70	N/A 123197	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 334.00 mm	N/A Seal Guides
334 X 5 B-90	N/A 123198	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 334.00 mm	N/A Seal Guides
335 X 5 B-70	N/A 123199	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 335.00 mm	N/A Seal Guides
335 X 5 B-90	N/A 123200	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 335.00 mm	N/A Seal Guides
336x5.00B70	N/A 123201	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 70	N/A 336.00 mm	N/A Seal Guides
336 X 5 B-90	N/A 123202	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 5.00 mm	N/A 90	N/A 336.00 mm	N/A Seal Guides

N/A
123178

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 324.00 mm

N/A Seal Guides

325x5.00B70

N/A
123179

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 325.00 mm

N/A Seal Guides

325 X 5 B-90

N/A
123180

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 325.00 mm

N/A Seal Guides

326 X 5 B-70

N/A
123181

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 326.00 mm

N/A Seal Guides

326 X 5 B-90

N/A
123182

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 326.00 mm

N/A Seal Guides

327 X 5 B-70

N/A
123183

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 327.00 mm

N/A Seal Guides

327 X 5 B-90

N/A
123184

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 327.00 mm

N/A Seal Guides

328 X 5 B-70

N/A
123185

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 328.00 mm

N/A Seal Guides

328 X 5 B-90

N/A
123186

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 328.00 mm

N/A Seal Guides

329 X 5 B-70

N/A
123187

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 329.00 mm

N/A Seal Guides

329 X 5 B-90

N/A
123188

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 329.00 mm

N/A Seal Guides

330x5.00B70

N/A
123189

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 330.00 mm

N/A Seal Guides

330 X 5 B-90

N/A
123190

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 330.00 mm

N/A Seal Guides

331 X 5 B-70

N/A
123191

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 331.00 mm

N/A Seal Guides

331 X 5 B-90

N/A
123192

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 331.00 mm

N/A Seal Guides

332 X 5 B-70

N/A
123193

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 332.00 mm

N/A Seal Guides

332 X 5 B-90

N/A
123194

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 332.00 mm

N/A Seal Guides

333 X 5 B-70

N/A
123195

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 333.00 mm

N/A Seal Guides

333 X 5 B-90

N/A
123196

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 333.00 mm

N/A Seal Guides

334 X 5 B-70

N/A
123197

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 334.00 mm

N/A Seal Guides

334 X 5 B-90

N/A
123198

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 334.00 mm

N/A Seal Guides

335 X 5 B-70

N/A
123199

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 335.00 mm

N/A Seal Guides

335 X 5 B-90

N/A
123200

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 335.00 mm

N/A Seal Guides

336x5.00B70

N/A
123201

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 70

N/A 336.00 mm

N/A Seal Guides

336 X 5 B-90

N/A
123202

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 5.00 mm

N/A 90

N/A 336.00 mm

N/A Seal Guides