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
3.5 X 1.2 B-70	N/A 117221	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 70	N/A 3.50 mm
3.5 X 1.2 B-90	N/A 117222	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 90	N/A 3.50 mm
5 X 1.2 B-70	N/A 117223	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 70	N/A 5.00 mm
5 X 1.2 B-90	N/A 117224	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 90	N/A 5.00 mm
24 X 1.2 B-70	N/A 117225	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 70	N/A 24.00 mm
24 X 1.2 B-90	N/A 117226	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 90	N/A 24.00 mm
26 X 1.2 B-70	N/A 117227	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 70	N/A 26.00 mm
26 X 1.2 B-90	N/A 117228	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 90	N/A 26.00 mm
28 X 1.2 B-70	N/A 117229	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 70	N/A 28.00 mm
28 X 1.2 B-90	N/A 117230	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 90	N/A 28.00 mm
35 X 1.2 B-70	N/A 117231	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 70	N/A 35.00 mm
35 X 1.2 B-90	N/A 117232	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 90	N/A 35.00 mm
40 X 1.2 B-70	N/A 117233	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 70	N/A 40.00 mm
40 X 1.2 B-90	N/A 117234	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 90	N/A 40.00 mm
53.5 X 1.2 B-70	N/A 117235	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 70	N/A 53.50 mm
53.5 X 1.2 B-90	N/A 117236	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 90	N/A 53.50 mm
98 X 1.2 B-70	N/A 117237	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 70	N/A 98.00 mm
98 X 1.2 B-90	N/A 117238	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 90	N/A 98.00 mm
3.8 X 1.25 B-70	N/A 117239	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.25 mm	N/A 70	N/A 3.80 mm
3.8 X 1.25 B-90	N/A 117240	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.25 mm	N/A 90	N/A 3.80 mm
8 X 1.25 B-70	N/A 117241	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.25 mm	N/A 70	N/A 8.00 mm
8 X 1.25 B-90	N/A 117242	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.25 mm	N/A 90	N/A 8.00 mm
16 X 1.25 B-70	N/A 117243	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.25 mm	N/A 70	N/A 16.00 mm
16 X 1.25 B-90	N/A 117244	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.25 mm	N/A 90	N/A 16.00 mm
1.07 X 1.27 B-70	N/A 117245	N/A Metric Standard O-Ring	N/A Buna	N/A 2	N/A 1.27 mm	N/A 70	N/A 1.07 mm

N/A
117221

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 70

N/A 3.50 mm

3.5 X 1.2 B-90

N/A
117222

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 90

N/A 3.50 mm

5 X 1.2 B-70

N/A
117223

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 70

N/A 5.00 mm

5 X 1.2 B-90

N/A
117224

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 90

N/A 5.00 mm

24 X 1.2 B-70

N/A
117225

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 70

N/A 24.00 mm

24 X 1.2 B-90

N/A
117226

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 90

N/A 24.00 mm

26 X 1.2 B-70

N/A
117227

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 70

N/A 26.00 mm

26 X 1.2 B-90

N/A
117228

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 90

N/A 26.00 mm

28 X 1.2 B-70

N/A
117229

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 70

N/A 28.00 mm

28 X 1.2 B-90

N/A
117230

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 90

N/A 28.00 mm

35 X 1.2 B-70

N/A
117231

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 70

N/A 35.00 mm

35 X 1.2 B-90

N/A
117232

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 90

N/A 35.00 mm

40 X 1.2 B-70

N/A
117233

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 70

N/A 40.00 mm

40 X 1.2 B-90

N/A
117234

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 90

N/A 40.00 mm

53.5 X 1.2 B-70

N/A
117235

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 70

N/A 53.50 mm

53.5 X 1.2 B-90

N/A
117236

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 90

N/A 53.50 mm

98 X 1.2 B-70

N/A
117237

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 70

N/A 98.00 mm

98 X 1.2 B-90

N/A
117238

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 90

N/A 98.00 mm

3.8 X 1.25 B-70

N/A
117239

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.25 mm

N/A 70

N/A 3.80 mm

3.8 X 1.25 B-90

N/A
117240

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.25 mm

N/A 90

N/A 3.80 mm

8 X 1.25 B-70

N/A
117241

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.25 mm

N/A 70

N/A 8.00 mm

8 X 1.25 B-90

N/A
117242

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.25 mm

N/A 90

N/A 8.00 mm

16 X 1.25 B-70

N/A
117243

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.25 mm

N/A 70

N/A 16.00 mm

16 X 1.25 B-90

N/A
117244

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.25 mm

N/A 90

N/A 16.00 mm

1.07 X 1.27 B-70

N/A
117245

N/A Metric Standard O-Ring

N/A Buna

N/A 2

N/A 1.27 mm

N/A 70

N/A 1.07 mm