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
101 X 2.5 B-90	N/A 118756	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 101.00 mm
103x2.50B70	N/A 118757	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 103.00 mm
103 X 2.5 B-90	N/A 118758	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 103.00 mm
105x2.50B70	N/A 118759	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 105.00 mm
105 X 2.5 B-90	N/A 118760	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 105.00 mm
106x2.50B70	N/A 118761	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 106.00 mm
106 X 2.5 B-90	N/A 118762	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 106.00 mm
107x2.50B70	N/A 118763	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 107.00 mm
107 X 2.5 B-90	N/A 118764	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 107.00 mm
108x2.50B70	N/A 118765	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 108.00 mm
108 X 2.5 B-90	N/A 118766	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 108.00 mm
109 X 250 B-70	N/A 118767	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 250.00 mm	N/A 70	N/A 109.00 mm
109 X 250 B-90	N/A 118768	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 250.00 mm	N/A 90	N/A 109.00 mm
110x2.50B70	N/A 118769	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 110.00 mm
110 X 2.5 B-90	N/A 118770	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 110.00 mm
111x2.50B70	N/A 118771	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 111.00 mm
111 X 2.5 B-90	N/A 118772	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 111.00 mm
112x2.50B70	N/A 118773	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 112.00 mm
112 X 2.5 B-90	N/A 118774	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 112.00 mm
113x2.50B70	N/A 118775	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 113.00 mm
113 X 2.5 B-90	N/A 118776	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 113.00 mm
114x2.50B70	N/A 118777	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 114.00 mm
114 X 2.5 B-90	N/A 118778	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 114.00 mm
115x2.50B70	N/A 118779	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 115.00 mm
115 X 2.5 B-90	N/A 118780	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 115.00 mm

N/A
118756

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 101.00 mm

103x2.50B70

N/A
118757

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 103.00 mm

103 X 2.5 B-90

N/A
118758

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 103.00 mm

105x2.50B70

N/A
118759

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 105.00 mm

105 X 2.5 B-90

N/A
118760

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 105.00 mm

106x2.50B70

N/A
118761

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 106.00 mm

106 X 2.5 B-90

N/A
118762

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 106.00 mm

107x2.50B70

N/A
118763

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 107.00 mm

107 X 2.5 B-90

N/A
118764

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 107.00 mm

108x2.50B70

N/A
118765

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 108.00 mm

108 X 2.5 B-90

N/A
118766

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 108.00 mm

109 X 250 B-70

N/A
118767

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 250.00 mm

N/A 70

N/A 109.00 mm

109 X 250 B-90

N/A
118768

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 250.00 mm

N/A 90

N/A 109.00 mm

110x2.50B70

N/A
118769

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 110.00 mm

110 X 2.5 B-90

N/A
118770

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 110.00 mm

111x2.50B70

N/A
118771

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 111.00 mm

111 X 2.5 B-90

N/A
118772

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 111.00 mm

112x2.50B70

N/A
118773

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 112.00 mm

112 X 2.5 B-90

N/A
118774

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 112.00 mm

113x2.50B70

N/A
118775

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 113.00 mm

113 X 2.5 B-90

N/A
118776

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 113.00 mm

114x2.50B70

N/A
118777

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 114.00 mm

114 X 2.5 B-90

N/A
118778

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 114.00 mm

115x2.50B70

N/A
118779

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 115.00 mm

115 X 2.5 B-90

N/A
118780

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 115.00 mm