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
17.1 X 1.6 B-90	N/A 117596	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 90	N/A 17.10 mm	N/A Seal Guides
18.1 X 1.6 B-70	N/A 117597	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 70	N/A 18.10 mm	N/A Seal Guides
18.1 X 1.6 B-90	N/A 117598	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 90	N/A 18.10 mm	N/A Seal Guides
19.1 X 1.6 B-70	N/A 117599	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 70	N/A 19.10 mm	N/A Seal Guides
19.1 X 1.6 B-90	N/A 117600	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 90	N/A 19.10 mm	N/A Seal Guides
20.3 X 1.6 B-70	N/A 117601	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 70	N/A 20.30 mm	N/A Seal Guides
20.3 X 1.6 B-90	N/A 117602	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 90	N/A 20.30 mm	N/A Seal Guides
21.1 X 1.6 B-70	N/A 117603	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 70	N/A 21.10 mm	N/A Seal Guides
21.1 X 1.6 B-90	N/A 117604	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 90	N/A 21.10 mm	N/A Seal Guides
22.1 X 1.6 B-70	N/A 117605	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 70	N/A 22.10 mm	N/A Seal Guides
22.1 X 1.6 B-90	N/A 117606	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 90	N/A 22.10 mm	N/A Seal Guides
25.1 X 1.6 B-70	N/A 117607	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 70	N/A 25.10 mm	N/A Seal Guides
25.1 X 1.6 B-90	N/A 117608	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 90	N/A 25.10 mm	N/A Seal Guides
27.1 X 1.6 B-70	N/A 117609	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 70	N/A 27.10 mm	N/A Seal Guides
27.1 X 1.6 B-90	N/A 117610	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 90	N/A 27.10 mm	N/A Seal Guides
29.1 X 1.6 B-70	N/A 117611	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 70	N/A 29.10 mm	N/A Seal Guides
29.1 X 1.6 B-90	N/A 117612	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 90	N/A 29.10 mm	N/A Seal Guides
32.1 X 1.6 B-70	N/A 117613	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 70	N/A 32.10 mm	N/A Seal Guides
32.1 X 1.6 B-90	N/A 117614	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 90	N/A 32.10 mm	N/A Seal Guides
35.1 X 1.6 B-70	N/A 117615	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 70	N/A 35.10 mm	N/A Seal Guides
35.1 X 1.6 B-90	N/A 117616	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 90	N/A 35.10 mm	N/A Seal Guides
37.1 X 1.6 B-70	N/A 117617	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 70	N/A 37.10 mm	N/A Seal Guides
37.1 X 1.6 B-90	N/A 117618	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 90	N/A 37.10 mm	N/A Seal Guides
51.1 X 1.6 B-70	N/A 117619	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 70	N/A 51.10 mm	N/A Seal Guides
51.1 X 1.6 B-90	N/A 117620	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.60 mm	N/A 90	N/A 51.10 mm	N/A Seal Guides

N/A
117596

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 90

N/A 17.10 mm

N/A Seal Guides

18.1 X 1.6 B-70

N/A
117597

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 70

N/A 18.10 mm

N/A Seal Guides

18.1 X 1.6 B-90

N/A
117598

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 90

N/A 18.10 mm

N/A Seal Guides

19.1 X 1.6 B-70

N/A
117599

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 70

N/A 19.10 mm

N/A Seal Guides

19.1 X 1.6 B-90

N/A
117600

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 90

N/A 19.10 mm

N/A Seal Guides

20.3 X 1.6 B-70

N/A
117601

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 70

N/A 20.30 mm

N/A Seal Guides

20.3 X 1.6 B-90

N/A
117602

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 90

N/A 20.30 mm

N/A Seal Guides

21.1 X 1.6 B-70

N/A
117603

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 70

N/A 21.10 mm

N/A Seal Guides

21.1 X 1.6 B-90

N/A
117604

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 90

N/A 21.10 mm

N/A Seal Guides

22.1 X 1.6 B-70

N/A
117605

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 70

N/A 22.10 mm

N/A Seal Guides

22.1 X 1.6 B-90

N/A
117606

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 90

N/A 22.10 mm

N/A Seal Guides

25.1 X 1.6 B-70

N/A
117607

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 70

N/A 25.10 mm

N/A Seal Guides

25.1 X 1.6 B-90

N/A
117608

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 90

N/A 25.10 mm

N/A Seal Guides

27.1 X 1.6 B-70

N/A
117609

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 70

N/A 27.10 mm

N/A Seal Guides

27.1 X 1.6 B-90

N/A
117610

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 90

N/A 27.10 mm

N/A Seal Guides

29.1 X 1.6 B-70

N/A
117611

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 70

N/A 29.10 mm

N/A Seal Guides

29.1 X 1.6 B-90

N/A
117612

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 90

N/A 29.10 mm

N/A Seal Guides

32.1 X 1.6 B-70

N/A
117613

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 70

N/A 32.10 mm

N/A Seal Guides

32.1 X 1.6 B-90

N/A
117614

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 90

N/A 32.10 mm

N/A Seal Guides

35.1 X 1.6 B-70

N/A
117615

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 70

N/A 35.10 mm

N/A Seal Guides

35.1 X 1.6 B-90

N/A
117616

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 90

N/A 35.10 mm

N/A Seal Guides

37.1 X 1.6 B-70

N/A
117617

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 70

N/A 37.10 mm

N/A Seal Guides

37.1 X 1.6 B-90

N/A
117618

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 90

N/A 37.10 mm

N/A Seal Guides

51.1 X 1.6 B-70

N/A
117619

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 70

N/A 51.10 mm

N/A Seal Guides

51.1 X 1.6 B-90

N/A
117620

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.60 mm

N/A 90

N/A 51.10 mm

N/A Seal Guides