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
28.4 X 2.7 B-90	N/A 119116	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 90	N/A 28.40 mm
117 X 2.7 B-70	N/A 119117	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 70	N/A 117.00 mm
117 X 2.7 B-90	N/A 119118	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.70 mm	N/A 90	N/A 117.00 mm
9.53 X 2.93 B-70	N/A 119119	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.93 mm	N/A 70	N/A 9.53 mm
9.53 X 2.93 B-90	N/A 119120	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.93 mm	N/A 90	N/A 9.53 mm
21.92 X 2.95 B-70	N/A 119121	N/A Metric Standard O-Ring	N/A Buna	N/A 911	N/A 2.95 mm	N/A 70	N/A 21.92 mm
21.92 X 2.95 B-90	N/A 119122	N/A Metric Standard O-Ring	N/A Buna	N/A 911	N/A 2.95 mm	N/A 90	N/A 21.92 mm
23.47 X 2.95 B-70	N/A 119123	N/A Metric Standard O-Ring	N/A Buna	N/A 912	N/A 2.95 mm	N/A 70	N/A 23.47 mm
23.47 X 2.95 B-90	N/A 119124	N/A Metric Standard O-Ring	N/A Buna	N/A 912	N/A 2.95 mm	N/A 90	N/A 23.47 mm
25.04 X 2.95 B-70	N/A 119125	N/A Metric Standard O-Ring	N/A Buna	N/A 913	N/A 2.95 mm	N/A 70	N/A 25.04 mm
25.04 X 2.95 B-90	N/A 119126	N/A Metric Standard O-Ring	N/A Buna	N/A 913	N/A 2.95 mm	N/A 90	N/A 25.04 mm
26.59 X 2.95 B-70	N/A 119127	N/A Metric Standard O-Ring	N/A Buna	N/A 914	N/A 2.95 mm	N/A 70	N/A 26.59 mm
26.59 X 2.95 B-90	N/A 119128	N/A Metric Standard O-Ring	N/A Buna	N/A 914	N/A 2.95 mm	N/A 90	N/A 26.59 mm
29.74 X 2.95 B-70	N/A 119129	N/A Metric Standard O-Ring	N/A Buna	N/A 916	N/A 2.95 mm	N/A 70	N/A 29.74 mm
29.74 X 2.95 B-90	N/A 119130	N/A Metric Standard O-Ring	N/A Buna	N/A 916	N/A 2.95 mm	N/A 90	N/A 29.74 mm
34.42 X 2.95 B-70	N/A 119131	N/A Metric Standard O-Ring	N/A Buna	N/A 918	N/A 2.95 mm	N/A 70	N/A 34.42 mm
34.42 X 2.95 B-90	N/A 119132	N/A Metric Standard O-Ring	N/A Buna	N/A 918	N/A 2.95 mm	N/A 90	N/A 34.42 mm
3 X 3 B-70	N/A 119133	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 3.00 mm
3 X 3 B-90	N/A 119134	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 3.00 mm
3.5 X 3 B-70	N/A 119135	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 3.50 mm
3.5 X 3 B-90	N/A 119136	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 3.50 mm
4 X 3 B-70	N/A 119137	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 4.00 mm
4 X 3 B-90	N/A 119138	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 4.00 mm
4.5 X 3 B-70	N/A 119139	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 4.50 mm
4.5 X 3 B-90	N/A 119140	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 4.50 mm

N/A
119116

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 90

N/A 28.40 mm

117 X 2.7 B-70

N/A
119117

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 70

N/A 117.00 mm

117 X 2.7 B-90

N/A
119118

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.70 mm

N/A 90

N/A 117.00 mm

9.53 X 2.93 B-70

N/A
119119

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.93 mm

N/A 70

N/A 9.53 mm

9.53 X 2.93 B-90

N/A
119120

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.93 mm

N/A 90

N/A 9.53 mm

21.92 X 2.95 B-70

N/A
119121

N/A Metric Standard O-Ring

N/A Buna

N/A 911

N/A 2.95 mm

N/A 70

N/A 21.92 mm

21.92 X 2.95 B-90

N/A
119122

N/A Metric Standard O-Ring

N/A Buna

N/A 911

N/A 2.95 mm

N/A 90

N/A 21.92 mm

23.47 X 2.95 B-70

N/A
119123

N/A Metric Standard O-Ring

N/A Buna

N/A 912

N/A 2.95 mm

N/A 70

N/A 23.47 mm

23.47 X 2.95 B-90

N/A
119124

N/A Metric Standard O-Ring

N/A Buna

N/A 912

N/A 2.95 mm

N/A 90

N/A 23.47 mm

25.04 X 2.95 B-70

N/A
119125

N/A Metric Standard O-Ring

N/A Buna

N/A 913

N/A 2.95 mm

N/A 70

N/A 25.04 mm

25.04 X 2.95 B-90

N/A
119126

N/A Metric Standard O-Ring

N/A Buna

N/A 913

N/A 2.95 mm

N/A 90

N/A 25.04 mm

26.59 X 2.95 B-70

N/A
119127

N/A Metric Standard O-Ring

N/A Buna

N/A 914

N/A 2.95 mm

N/A 70

N/A 26.59 mm

26.59 X 2.95 B-90

N/A
119128

N/A Metric Standard O-Ring

N/A Buna

N/A 914

N/A 2.95 mm

N/A 90

N/A 26.59 mm

29.74 X 2.95 B-70

N/A
119129

N/A Metric Standard O-Ring

N/A Buna

N/A 916

N/A 2.95 mm

N/A 70

N/A 29.74 mm

29.74 X 2.95 B-90

N/A
119130

N/A Metric Standard O-Ring

N/A Buna

N/A 916

N/A 2.95 mm

N/A 90

N/A 29.74 mm

34.42 X 2.95 B-70

N/A
119131

N/A Metric Standard O-Ring

N/A Buna

N/A 918

N/A 2.95 mm

N/A 70

N/A 34.42 mm

34.42 X 2.95 B-90

N/A
119132

N/A Metric Standard O-Ring

N/A Buna

N/A 918

N/A 2.95 mm

N/A 90

N/A 34.42 mm

3 X 3 B-70

N/A
119133

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 3.00 mm

3 X 3 B-90

N/A
119134

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 3.00 mm

3.5 X 3 B-70

N/A
119135

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 3.50 mm

3.5 X 3 B-90

N/A
119136

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 3.50 mm

4 X 3 B-70

N/A
119137

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 4.00 mm

4 X 3 B-90

N/A
119138

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 4.00 mm

4.5 X 3 B-70

N/A
119139

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 4.50 mm

4.5 X 3 B-90

N/A
119140

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 4.50 mm