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
260 X 3 B-70	N/A 119841	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 260.00 mm
260 X 3 B-90	N/A 119842	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 260.00 mm
264 X 3 B-70	N/A 119843	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 264.00 mm
264 X 3 B-90	N/A 119844	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 264.00 mm
270 X 3 B-70	N/A 119845	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 270.00 mm
270 X 3 B-90	N/A 119846	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 270.00 mm
280 X 3 B-70	N/A 119847	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 280.00 mm
280 X 3 B-90	N/A 119848	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 280.00 mm
300 X 3 B-70	N/A 119849	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 300.00 mm
300 X 3 B-90	N/A 119850	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 300.00 mm
315 X 3 B-70	N/A 119851	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 315.00 mm
315 X 3 B-90	N/A 119852	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 315.00 mm
320 X 3 B-70	N/A 119853	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 320.00 mm
320 X 3 B-90	N/A 119854	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 320.00 mm
350 X 3 B-70	N/A 119855	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 350.00 mm
350 X 3 B-90	N/A 119856	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 350.00 mm
440 X 3 B-70	N/A 119857	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 440.00 mm
440 X 3 B-90	N/A 119858	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 440.00 mm
505 X 3 B-70	N/A 119859	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 505.00 mm
505 X 3 B-90	N/A 119860	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 505.00 mm
518.5 X 3 B-70	N/A 119861	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 518.50 mm
518.5 X 3 B-90	N/A 119862	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 518.50 mm
24.4 X 3.1 B-70	N/A 119863	N/A Metric Standard O-Ring	N/A Buna	N/A G25	N/A 3.10 mm	N/A 70	N/A 24.40 mm
24.4 X 3.1 B-90	N/A 119864	N/A Metric Standard O-Ring	N/A Buna	N/A G25	N/A 3.10 mm	N/A 90	N/A 24.40 mm
29.4 X 3.1 B-70	N/A 119865	N/A Metric Standard O-Ring	N/A Buna	N/A G30	N/A 3.10 mm	N/A 70	N/A 29.40 mm

N/A
119841

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 260.00 mm

260 X 3 B-90

N/A
119842

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 260.00 mm

264 X 3 B-70

N/A
119843

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 264.00 mm

264 X 3 B-90

N/A
119844

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 264.00 mm

270 X 3 B-70

N/A
119845

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 270.00 mm

270 X 3 B-90

N/A
119846

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 270.00 mm

280 X 3 B-70

N/A
119847

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 280.00 mm

280 X 3 B-90

N/A
119848

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 280.00 mm

300 X 3 B-70

N/A
119849

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 300.00 mm

300 X 3 B-90

N/A
119850

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 300.00 mm

315 X 3 B-70

N/A
119851

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 315.00 mm

315 X 3 B-90

N/A
119852

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 315.00 mm

320 X 3 B-70

N/A
119853

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 320.00 mm

320 X 3 B-90

N/A
119854

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 320.00 mm

350 X 3 B-70

N/A
119855

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 350.00 mm

350 X 3 B-90

N/A
119856

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 350.00 mm

440 X 3 B-70

N/A
119857

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 440.00 mm

440 X 3 B-90

N/A
119858

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 440.00 mm

505 X 3 B-70

N/A
119859

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 505.00 mm

505 X 3 B-90

N/A
119860

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 505.00 mm

518.5 X 3 B-70

N/A
119861

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 518.50 mm

518.5 X 3 B-90

N/A
119862

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 518.50 mm

24.4 X 3.1 B-70

N/A
119863

N/A Metric Standard O-Ring

N/A Buna

N/A G25

N/A 3.10 mm

N/A 70

N/A 24.40 mm

24.4 X 3.1 B-90

N/A
119864

N/A Metric Standard O-Ring

N/A Buna

N/A G25

N/A 3.10 mm

N/A 90

N/A 24.40 mm

29.4 X 3.1 B-70

N/A
119865

N/A Metric Standard O-Ring

N/A Buna

N/A G30

N/A 3.10 mm

N/A 70

N/A 29.40 mm