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
262 X 3.5 B-70	N/A 120493	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 262.00 mm	N/A Seal Guides
262 X 3.5 B-90	N/A 120494	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 262.00 mm	N/A Seal Guides
263 X 3.5 B-70	N/A 120495	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 263.00 mm	N/A Seal Guides
263 X 3.5 B-90	N/A 120496	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 263.00 mm	N/A Seal Guides
264 X 3.5 B-70	N/A 120497	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 264.00 mm	N/A Seal Guides
264 X 3.5 B-90	N/A 120498	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 264.00 mm	N/A Seal Guides
265 X 3.5 B-70	N/A 120499	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 265.00 mm	N/A Seal Guides
265 X 3.5 B-90	N/A 120500	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 265.00 mm	N/A Seal Guides
266 X 3.5 B-70	N/A 120501	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 266.00 mm	N/A Seal Guides
266 X 3.5 B-90	N/A 120502	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 266.00 mm	N/A Seal Guides
267 X 3.5 B-70	N/A 120503	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 267.00 mm	N/A Seal Guides
267 X 3.5 B-90	N/A 120504	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 267.00 mm	N/A Seal Guides
268 X 3.5 B-70	N/A 120505	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 268.00 mm	N/A Seal Guides
268 X 3.5 B-90	N/A 120506	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 268.00 mm	N/A Seal Guides
269x3.50B70	N/A 120507	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 269.00 mm	N/A Seal Guides
269 X 3.5 B-90	N/A 120508	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 269.00 mm	N/A Seal Guides
270x3.50B70	N/A 120509	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 270.00 mm	N/A Seal Guides
270 X 3.5 B-90	N/A 120510	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 270.00 mm	N/A Seal Guides
271 X 3.5 B-70	N/A 120511	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 271.00 mm	N/A Seal Guides
271 X 3.5 B-90	N/A 120512	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 271.00 mm	N/A Seal Guides
272 X 3.5 B-70	N/A 120513	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 272.00 mm	N/A Seal Guides
272 X 3.5 B-90	N/A 120514	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 272.00 mm	N/A Seal Guides
273x3.50B70	N/A 120515	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 273.00 mm	N/A Seal Guides
273 X 3.5 B-90	N/A 120516	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 273.00 mm	N/A Seal Guides
274x3.50B70	N/A 120517	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 274.00 mm	N/A Seal Guides

N/A
120493

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 262.00 mm

N/A Seal Guides

262 X 3.5 B-90

N/A
120494

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 262.00 mm

N/A Seal Guides

263 X 3.5 B-70

N/A
120495

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 263.00 mm

N/A Seal Guides

263 X 3.5 B-90

N/A
120496

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 263.00 mm

N/A Seal Guides

264 X 3.5 B-70

N/A
120497

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 264.00 mm

N/A Seal Guides

264 X 3.5 B-90

N/A
120498

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 264.00 mm

N/A Seal Guides

265 X 3.5 B-70

N/A
120499

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 265.00 mm

N/A Seal Guides

265 X 3.5 B-90

N/A
120500

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 265.00 mm

N/A Seal Guides

266 X 3.5 B-70

N/A
120501

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 266.00 mm

N/A Seal Guides

266 X 3.5 B-90

N/A
120502

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 266.00 mm

N/A Seal Guides

267 X 3.5 B-70

N/A
120503

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 267.00 mm

N/A Seal Guides

267 X 3.5 B-90

N/A
120504

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 267.00 mm

N/A Seal Guides

268 X 3.5 B-70

N/A
120505

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 268.00 mm

N/A Seal Guides

268 X 3.5 B-90

N/A
120506

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 268.00 mm

N/A Seal Guides

269x3.50B70

N/A
120507

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 269.00 mm

N/A Seal Guides

269 X 3.5 B-90

N/A
120508

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 269.00 mm

N/A Seal Guides

270x3.50B70

N/A
120509

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 270.00 mm

N/A Seal Guides

270 X 3.5 B-90

N/A
120510

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 270.00 mm

N/A Seal Guides

271 X 3.5 B-70

N/A
120511

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 271.00 mm

N/A Seal Guides

271 X 3.5 B-90

N/A
120512

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 271.00 mm

N/A Seal Guides

272 X 3.5 B-70

N/A
120513

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 272.00 mm

N/A Seal Guides

272 X 3.5 B-90

N/A
120514

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 272.00 mm

N/A Seal Guides

273x3.50B70

N/A
120515

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 273.00 mm

N/A Seal Guides

273 X 3.5 B-90

N/A
120516

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 273.00 mm

N/A Seal Guides

274x3.50B70

N/A
120517

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 274.00 mm

N/A Seal Guides