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
37.5x2.65B70	N/A 119091	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.65 mm	N/A 70	N/A 37.50 mm
37.5 X 2.65 B-90	N/A 119092	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.65 mm	N/A 90	N/A 37.50 mm
38.7x2.65B70	N/A 119093	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.65 mm	N/A 70	N/A 38.70 mm
38.7 X 2.65 B-90	N/A 119094	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.65 mm	N/A 90	N/A 38.70 mm
8.35 X 2.7 B-70	N/A 119095	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 70	N/A 8.35 mm
8.35 X 2.7 B-90	N/A 119096	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 90	N/A 8.35 mm
890 X 2.7 B-70	N/A 119097	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 70	N/A 890.00 mm
890 X 2.7 B-90	N/A 119098	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 90	N/A 890.00 mm
10.5 X 2.7 B-70	N/A 119099	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 70	N/A 10.50 mm
10.5 X 2.7 B-90	N/A 119100	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 90	N/A 10.50 mm
12.1x2.70B70	N/A 119101	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 70	N/A 12.10 mm
12.1 X 2.7 B-90	N/A 119102	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 90	N/A 12.10 mm
13.6x2.70B70	N/A 119103	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 70	N/A 13.60 mm
13.6 X 2.7 B-90	N/A 119104	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 90	N/A 13.60 mm
15.1x2.70B70	N/A 119105	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 70	N/A 15.10 mm
15.1 X 2.7 B-90	N/A 119106	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 90	N/A 15.10 mm
16.9x2.70B70	N/A 119107	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 70	N/A 16.90 mm
16.9 X 2.7 B-90	N/A 119108	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 90	N/A 16.90 mm
18.4 X 2.7 B-70	N/A 119109	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 70	N/A 18.40 mm
18.4 X 2.7 B-90	N/A 119110	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 90	N/A 18.40 mm
18.6 X 2.7 B-70	N/A 119111	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 70	N/A 18.60 mm
18.6 X 2.7 B-90	N/A 119112	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 90	N/A 18.60 mm
27.3 X 2.7 B-70	N/A 119113	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 70	N/A 27.30 mm
27.3 X 2.7 B-90	N/A 119114	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 90	N/A 27.30 mm
28.4 X 2.7 B-70	N/A 119115	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 70	N/A 28.40 mm

N/A
119091

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.65 mm

N/A 70

N/A 37.50 mm

37.5 X 2.65 B-90

N/A
119092

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.65 mm

N/A 90

N/A 37.50 mm

38.7x2.65B70

N/A
119093

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.65 mm

N/A 70

N/A 38.70 mm

38.7 X 2.65 B-90

N/A
119094

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.65 mm

N/A 90

N/A 38.70 mm

8.35 X 2.7 B-70

N/A
119095

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 70

N/A 8.35 mm

8.35 X 2.7 B-90

N/A
119096

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 90

N/A 8.35 mm

890 X 2.7 B-70

N/A
119097

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 70

N/A 890.00 mm

890 X 2.7 B-90

N/A
119098

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 90

N/A 890.00 mm

10.5 X 2.7 B-70

N/A
119099

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 70

N/A 10.50 mm

10.5 X 2.7 B-90

N/A
119100

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 90

N/A 10.50 mm

12.1x2.70B70

N/A
119101

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 70

N/A 12.10 mm

12.1 X 2.7 B-90

N/A
119102

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 90

N/A 12.10 mm

13.6x2.70B70

N/A
119103

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 70

N/A 13.60 mm

13.6 X 2.7 B-90

N/A
119104

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 90

N/A 13.60 mm

15.1x2.70B70

N/A
119105

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 70

N/A 15.10 mm

15.1 X 2.7 B-90

N/A
119106

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 90

N/A 15.10 mm

16.9x2.70B70

N/A
119107

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 70

N/A 16.90 mm

16.9 X 2.7 B-90

N/A
119108

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 90

N/A 16.90 mm

18.4 X 2.7 B-70

N/A
119109

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 70

N/A 18.40 mm

18.4 X 2.7 B-90

N/A
119110

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 90

N/A 18.40 mm

18.6 X 2.7 B-70

N/A
119111

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 70

N/A 18.60 mm

18.6 X 2.7 B-90

N/A
119112

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 90

N/A 18.60 mm

27.3 X 2.7 B-70

N/A
119113

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 70

N/A 27.30 mm

27.3 X 2.7 B-90

N/A
119114

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 90

N/A 27.30 mm

28.4 X 2.7 B-70

N/A
119115

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 70

N/A 28.40 mm