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
17.5 X 3 B-70	N/A 119191	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 17.50 mm
17.5 X 3 B-90	N/A 119192	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 17.50 mm
18 X 3 B-70	N/A 119193	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 18.00 mm
18 X 3 B-90	N/A 119194	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 18.00 mm
18.2 X 3 B-70	N/A 119195	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 18.20 mm
18.2 X 3 B-90	N/A 119196	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 18.20 mm
18.5 X 3 B-70	N/A 119197	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 18.50 mm
18.5 X 3 B-90	N/A 119198	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 18.50 mm
19 X 3 B-70	N/A 119199	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 19.00 mm
19 X 3 B-90	N/A 119200	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 19.00 mm
19.2 X 3 B-70	N/A 119201	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 19.20 mm
19.2 X 3 B-90	N/A 119202	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 19.20 mm
19.5 X 3 B-70	N/A 119203	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 19.50 mm
19.5 X 3 B-90	N/A 119204	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 19.50 mm
20 X 3 B-70	N/A 119205	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 20.00 mm
20 X 3 B-90	N/A 119206	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 20.00 mm
20.5 X 3 B-70	N/A 119207	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 20.50 mm
20.5 X 3 B-90	N/A 119208	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 20.50 mm
21 X 3 B-70	N/A 119209	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 21.00 mm
21 X 3 B-90	N/A 119210	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 21.00 mm
21.5 X 3 B-70	N/A 119211	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 21.50 mm
21.5 X 3 B-90	N/A 119212	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 21.50 mm
22 X 3 B-70	N/A 119213	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 22.00 mm
22 X 3 B-90	N/A 119214	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 22.00 mm
22.2 X 3 B-70	N/A 119215	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 22.20 mm

N/A
119191

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 17.50 mm

17.5 X 3 B-90

N/A
119192

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 17.50 mm

18 X 3 B-70

N/A
119193

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 18.00 mm

18 X 3 B-90

N/A
119194

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 18.00 mm

18.2 X 3 B-70

N/A
119195

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 18.20 mm

18.2 X 3 B-90

N/A
119196

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 18.20 mm

18.5 X 3 B-70

N/A
119197

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 18.50 mm

18.5 X 3 B-90

N/A
119198

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 18.50 mm

19 X 3 B-70

N/A
119199

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 19.00 mm

19 X 3 B-90

N/A
119200

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 19.00 mm

19.2 X 3 B-70

N/A
119201

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 19.20 mm

19.2 X 3 B-90

N/A
119202

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 19.20 mm

19.5 X 3 B-70

N/A
119203

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 19.50 mm

19.5 X 3 B-90

N/A
119204

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 19.50 mm

20 X 3 B-70

N/A
119205

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 20.00 mm

20 X 3 B-90

N/A
119206

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 20.00 mm

20.5 X 3 B-70

N/A
119207

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 20.50 mm

20.5 X 3 B-90

N/A
119208

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 20.50 mm

21 X 3 B-70

N/A
119209

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 21.00 mm

21 X 3 B-90

N/A
119210

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 21.00 mm

21.5 X 3 B-70

N/A
119211

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 21.50 mm

21.5 X 3 B-90

N/A
119212

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 21.50 mm

22 X 3 B-70

N/A
119213

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 22.00 mm

22 X 3 B-90

N/A
119214

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 22.00 mm

22.2 X 3 B-70

N/A
119215

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 22.20 mm