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
61.6x2.40B70	N/A 118481	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 61.60 mm
61.6 X 2.4 B-90	N/A 118482	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 61.60 mm
64.6x2.40B70	N/A 118483	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 64.60 mm
64.6 X 2.4 B-90	N/A 118484	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 64.60 mm
67.6x2.40B70	N/A 118485	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 67.60 mm
67.6 X 2.4 B-90	N/A 118486	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 67.60 mm
69.6x2.40B70	N/A 118487	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 69.60 mm
69.6 X 2.4 B-90	N/A 118488	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 69.60 mm
161.6 X 2.4 B-70	N/A 118489	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 70	N/A 161.60 mm
161.6 X 2.4 B-90	N/A 118490	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.40 mm	N/A 90	N/A 161.60 mm
17.93 X 2.46 B-70	N/A 118491	N/A Metric Standard O-Ring	N/A Buna	N/A 909	N/A 2.46 mm	N/A 70	N/A 17.93 mm
17.93 X 2.46 B-90	N/A 118492	N/A Metric Standard O-Ring	N/A Buna	N/A 909	N/A 2.46 mm	N/A 90	N/A 17.93 mm
19.18 X 2.46 B-70	N/A 118493	N/A Metric Standard O-Ring	N/A Buna	N/A 910	N/A 2.46 mm	N/A 70	N/A 19.18 mm
19.18 X 2.46 B-90	N/A 118494	N/A Metric Standard O-Ring	N/A Buna	N/A 910	N/A 2.46 mm	N/A 90	N/A 19.18 mm
4x2.50B70	N/A 118495	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 4.00 mm
4 X 2.5 B-90	N/A 118496	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 4.00 mm
4.6x2.50B70	N/A 118497	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 4.60 mm
4.6 X 2.5 B-90	N/A 118498	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 4.60 mm
5x2.50B70	N/A 118499	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 5.00 mm
5 X 2.5 B-90	N/A 118500	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 5.00 mm
5.5x2.50B70	N/A 118501	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 5.50 mm
5.5 X 2.5 B-90	N/A 118502	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 5.50 mm
6x2.50B70	N/A 118503	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 6.00 mm
6 X 2.5 B-90	N/A 118504	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 6.00 mm
6.5x2.50B70	N/A 118505	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 6.50 mm

N/A
118481

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 61.60 mm

61.6 X 2.4 B-90

N/A
118482

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 61.60 mm

64.6x2.40B70

N/A
118483

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 64.60 mm

64.6 X 2.4 B-90

N/A
118484

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 64.60 mm

67.6x2.40B70

N/A
118485

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 67.60 mm

67.6 X 2.4 B-90

N/A
118486

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 67.60 mm

69.6x2.40B70

N/A
118487

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 69.60 mm

69.6 X 2.4 B-90

N/A
118488

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 69.60 mm

161.6 X 2.4 B-70

N/A
118489

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 70

N/A 161.60 mm

161.6 X 2.4 B-90

N/A
118490

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.40 mm

N/A 90

N/A 161.60 mm

17.93 X 2.46 B-70

N/A
118491

N/A Metric Standard O-Ring

N/A Buna

N/A 909

N/A 2.46 mm

N/A 70

N/A 17.93 mm

17.93 X 2.46 B-90

N/A
118492

N/A Metric Standard O-Ring

N/A Buna

N/A 909

N/A 2.46 mm

N/A 90

N/A 17.93 mm

19.18 X 2.46 B-70

N/A
118493

N/A Metric Standard O-Ring

N/A Buna

N/A 910

N/A 2.46 mm

N/A 70

N/A 19.18 mm

19.18 X 2.46 B-90

N/A
118494

N/A Metric Standard O-Ring

N/A Buna

N/A 910

N/A 2.46 mm

N/A 90

N/A 19.18 mm

4x2.50B70

N/A
118495

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 4.00 mm

4 X 2.5 B-90

N/A
118496

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 4.00 mm

4.6x2.50B70

N/A
118497

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 4.60 mm

4.6 X 2.5 B-90

N/A
118498

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 4.60 mm

5x2.50B70

N/A
118499

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 5.00 mm

5 X 2.5 B-90

N/A
118500

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 5.00 mm

5.5x2.50B70

N/A
118501

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 5.50 mm

5.5 X 2.5 B-90

N/A
118502

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 5.50 mm

6x2.50B70

N/A
118503

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 6.00 mm

6 X 2.5 B-90

N/A
118504

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 6.00 mm

6.5x2.50B70

N/A
118505

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 6.50 mm