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
14 X 1.78 B-70	N/A 117671	N/A Metric Standard O-Ring	N/A Buna	N/A 15	N/A 1.78 mm	N/A 70	N/A 14.00 mm
14 X 1.78 B-90	N/A 117672	N/A Metric Standard O-Ring	N/A Buna	N/A 15	N/A 1.78 mm	N/A 90	N/A 14.00 mm
15.6 X 1.78 B-70	N/A 117673	N/A Metric Standard O-Ring	N/A Buna	N/A 16	N/A 1.78 mm	N/A 70	N/A 15.60 mm
15.6 X 1.78 B-90	N/A 117674	N/A Metric Standard O-Ring	N/A Buna	N/A 16	N/A 1.78 mm	N/A 90	N/A 15.60 mm
17.17 X 1.78 B-70	N/A 117675	N/A Metric Standard O-Ring	N/A Buna	N/A 17	N/A 1.78 mm	N/A 70	N/A 17.17 mm
17.17 X 1.78 B-90	N/A 117676	N/A Metric Standard O-Ring	N/A Buna	N/A 17	N/A 1.78 mm	N/A 90	N/A 17.17 mm
18.77 X 1.78 B-70	N/A 117677	N/A Metric Standard O-Ring	N/A Buna	N/A 18	N/A 1.78 mm	N/A 70	N/A 18.77 mm
18.77 X 1.78 B-90	N/A 117678	N/A Metric Standard O-Ring	N/A Buna	N/A 18	N/A 1.78 mm	N/A 90	N/A 18.77 mm
19.05 X 1.78 B-70	N/A 117679	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.78 mm	N/A 70	N/A 19.05 mm
19.05 X 1.78 B-90	N/A 117680	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.78 mm	N/A 90	N/A 19.05 mm
19.15 X 1.78 B-70	N/A 117681	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.78 mm	N/A 70	N/A 19.15 mm
19.15 X 1.78 B-90	N/A 117682	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.78 mm	N/A 90	N/A 19.15 mm
20.35 X 1.78 B-70	N/A 117683	N/A Metric Standard O-Ring	N/A Buna	N/A 19	N/A 1.78 mm	N/A 70	N/A 20.35 mm
20.35 X 1.78 B-90	N/A 117684	N/A Metric Standard O-Ring	N/A Buna	N/A 19	N/A 1.78 mm	N/A 90	N/A 20.35 mm
21.47 X 1.78 B-70	N/A 117685	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.78 mm	N/A 70	N/A 21.47 mm
21.47 X 1.78 B-90	N/A 117686	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.78 mm	N/A 90	N/A 21.47 mm
21.95 X 1.78 B-70	N/A 117687	N/A Metric Standard O-Ring	N/A Buna	N/A 20	N/A 1.78 mm	N/A 70	N/A 21.95 mm
21.95 X 1.78 B-90	N/A 117688	N/A Metric Standard O-Ring	N/A Buna	N/A 20	N/A 1.78 mm	N/A 90	N/A 21.95 mm
23.52 X 1.78 B-70	N/A 117689	N/A Metric Standard O-Ring	N/A Buna	N/A 21	N/A 1.78 mm	N/A 70	N/A 23.52 mm
23.52 X 1.78 B-90	N/A 117690	N/A Metric Standard O-Ring	N/A Buna	N/A 21	N/A 1.78 mm	N/A 90	N/A 23.52 mm
25.12 X 1.78 B-70	N/A 117691	N/A Metric Standard O-Ring	N/A Buna	N/A 22	N/A 1.78 mm	N/A 70	N/A 25.12 mm
25.12 X 1.78 B-90	N/A 117692	N/A Metric Standard O-Ring	N/A Buna	N/A 22	N/A 1.78 mm	N/A 90	N/A 25.12 mm
26.7 X 1.78 B-70	N/A 117693	N/A Metric Standard O-Ring	N/A Buna	N/A 23	N/A 1.78 mm	N/A 70	N/A 26.70 mm
26.7 X 1.78 B-90	N/A 117694	N/A Metric Standard O-Ring	N/A Buna	N/A 23	N/A 1.78 mm	N/A 90	N/A 26.70 mm
28.3 X 1.78 B-70	N/A 117695	N/A Metric Standard O-Ring	N/A Buna	N/A 24	N/A 1.78 mm	N/A 70	N/A 28.30 mm

N/A
117671

N/A Metric Standard O-Ring

N/A Buna

N/A 15

N/A 1.78 mm

N/A 70

N/A 14.00 mm

14 X 1.78 B-90

N/A
117672

N/A Metric Standard O-Ring

N/A Buna

N/A 15

N/A 1.78 mm

N/A 90

N/A 14.00 mm

15.6 X 1.78 B-70

N/A
117673

N/A Metric Standard O-Ring

N/A Buna

N/A 16

N/A 1.78 mm

N/A 70

N/A 15.60 mm

15.6 X 1.78 B-90

N/A
117674

N/A Metric Standard O-Ring

N/A Buna

N/A 16

N/A 1.78 mm

N/A 90

N/A 15.60 mm

17.17 X 1.78 B-70

N/A
117675

N/A Metric Standard O-Ring

N/A Buna

N/A 17

N/A 1.78 mm

N/A 70

N/A 17.17 mm

17.17 X 1.78 B-90

N/A
117676

N/A Metric Standard O-Ring

N/A Buna

N/A 17

N/A 1.78 mm

N/A 90

N/A 17.17 mm

18.77 X 1.78 B-70

N/A
117677

N/A Metric Standard O-Ring

N/A Buna

N/A 18

N/A 1.78 mm

N/A 70

N/A 18.77 mm

18.77 X 1.78 B-90

N/A
117678

N/A Metric Standard O-Ring

N/A Buna

N/A 18

N/A 1.78 mm

N/A 90

N/A 18.77 mm

19.05 X 1.78 B-70

N/A
117679

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.78 mm

N/A 70

N/A 19.05 mm

19.05 X 1.78 B-90

N/A
117680

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.78 mm

N/A 90

N/A 19.05 mm

19.15 X 1.78 B-70

N/A
117681

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.78 mm

N/A 70

N/A 19.15 mm

19.15 X 1.78 B-90

N/A
117682

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.78 mm

N/A 90

N/A 19.15 mm

20.35 X 1.78 B-70

N/A
117683

N/A Metric Standard O-Ring

N/A Buna

N/A 19

N/A 1.78 mm

N/A 70

N/A 20.35 mm

20.35 X 1.78 B-90

N/A
117684

N/A Metric Standard O-Ring

N/A Buna

N/A 19

N/A 1.78 mm

N/A 90

N/A 20.35 mm

21.47 X 1.78 B-70

N/A
117685

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.78 mm

N/A 70

N/A 21.47 mm

21.47 X 1.78 B-90

N/A
117686

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.78 mm

N/A 90

N/A 21.47 mm

21.95 X 1.78 B-70

N/A
117687

N/A Metric Standard O-Ring

N/A Buna

N/A 20

N/A 1.78 mm

N/A 70

N/A 21.95 mm

21.95 X 1.78 B-90

N/A
117688

N/A Metric Standard O-Ring

N/A Buna

N/A 20

N/A 1.78 mm

N/A 90

N/A 21.95 mm

23.52 X 1.78 B-70

N/A
117689

N/A Metric Standard O-Ring

N/A Buna

N/A 21

N/A 1.78 mm

N/A 70

N/A 23.52 mm

23.52 X 1.78 B-90

N/A
117690

N/A Metric Standard O-Ring

N/A Buna

N/A 21

N/A 1.78 mm

N/A 90

N/A 23.52 mm

25.12 X 1.78 B-70

N/A
117691

N/A Metric Standard O-Ring

N/A Buna

N/A 22

N/A 1.78 mm

N/A 70

N/A 25.12 mm

25.12 X 1.78 B-90

N/A
117692

N/A Metric Standard O-Ring

N/A Buna

N/A 22

N/A 1.78 mm

N/A 90

N/A 25.12 mm

26.7 X 1.78 B-70

N/A
117693

N/A Metric Standard O-Ring

N/A Buna

N/A 23

N/A 1.78 mm

N/A 70

N/A 26.70 mm

26.7 X 1.78 B-90

N/A
117694

N/A Metric Standard O-Ring

N/A Buna

N/A 23

N/A 1.78 mm

N/A 90

N/A 26.70 mm

28.3 X 1.78 B-70

N/A
117695

N/A Metric Standard O-Ring

N/A Buna

N/A 24

N/A 1.78 mm

N/A 70

N/A 28.30 mm