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
760 X 7 B-90	N/A 124936	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 760.00 mm	N/A Seal Guides
880 X 7 B-70	N/A 124937	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 70	N/A 880.00 mm	N/A Seal Guides
880 X 7 B-90	N/A 124938	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.00 mm	N/A 90	N/A 880.00 mm	N/A Seal Guides
75 X 7.5 B-70	N/A 124939	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.50 mm	N/A 70	N/A 75.00 mm	N/A Seal Guides
75 X 7.5 B-90	N/A 124940	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 7.50 mm	N/A 90	N/A 75.00 mm	N/A Seal Guides
25x8.00B70	N/A 124941	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 25.00 mm	N/A Seal Guides
25 X 8 B-90	N/A 124942	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 25.00 mm	N/A Seal Guides
42 X 8 B-70	N/A 124943	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 42.00 mm	N/A Seal Guides
42 X 8 B-90	N/A 124944	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 42.00 mm	N/A Seal Guides
57x8.00B70	N/A 124945	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 57.00 mm	N/A Seal Guides
57 X 8 B-90	N/A 124946	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 57.00 mm	N/A Seal Guides
60x8.00B70	N/A 124947	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 60.00 mm	N/A Seal Guides
60 X 8 B-90	N/A 124948	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 60.00 mm	N/A Seal Guides
97 X 8 B-70	N/A 124949	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 97.00 mm	N/A Seal Guides
97 X 8 B-90	N/A 124950	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 97.00 mm	N/A Seal Guides
100x8.00B70	N/A 124951	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 100.00 mm	N/A Seal Guides
100 X 8 B-90	N/A 124952	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 100.00 mm	N/A Seal Guides
108 X 8 B-70	N/A 124953	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 108.00 mm	N/A Seal Guides
108 X 8 B-90	N/A 124954	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 108.00 mm	N/A Seal Guides
114 X 8 B-70	N/A 124955	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 114.00 mm	N/A Seal Guides
114 X 8 B-90	N/A 124956	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 114.00 mm	N/A Seal Guides
150x8.00B70	N/A 124957	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 150.00 mm	N/A Seal Guides
150 X 8 B-90	N/A 124958	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 150.00 mm	N/A Seal Guides
160x8.00B70	N/A 124959	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 70	N/A 160.00 mm	N/A Seal Guides
160 X 8 B-90	N/A 124960	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 8.00 mm	N/A 90	N/A 160.00 mm	N/A Seal Guides

N/A
124936

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 760.00 mm

N/A Seal Guides

880 X 7 B-70

N/A
124937

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 70

N/A 880.00 mm

N/A Seal Guides

880 X 7 B-90

N/A
124938

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.00 mm

N/A 90

N/A 880.00 mm

N/A Seal Guides

75 X 7.5 B-70

N/A
124939

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.50 mm

N/A 70

N/A 75.00 mm

N/A Seal Guides

75 X 7.5 B-90

N/A
124940

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 7.50 mm

N/A 90

N/A 75.00 mm

N/A Seal Guides

25x8.00B70

N/A
124941

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 25.00 mm

N/A Seal Guides

25 X 8 B-90

N/A
124942

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 25.00 mm

N/A Seal Guides

42 X 8 B-70

N/A
124943

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 42.00 mm

N/A Seal Guides

42 X 8 B-90

N/A
124944

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 42.00 mm

N/A Seal Guides

57x8.00B70

N/A
124945

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 57.00 mm

N/A Seal Guides

57 X 8 B-90

N/A
124946

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 57.00 mm

N/A Seal Guides

60x8.00B70

N/A
124947

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 60.00 mm

N/A Seal Guides

60 X 8 B-90

N/A
124948

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 60.00 mm

N/A Seal Guides

97 X 8 B-70

N/A
124949

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 97.00 mm

N/A Seal Guides

97 X 8 B-90

N/A
124950

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 97.00 mm

N/A Seal Guides

100x8.00B70

N/A
124951

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 100.00 mm

N/A Seal Guides

100 X 8 B-90

N/A
124952

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 100.00 mm

N/A Seal Guides

108 X 8 B-70

N/A
124953

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 108.00 mm

N/A Seal Guides

108 X 8 B-90

N/A
124954

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 108.00 mm

N/A Seal Guides

114 X 8 B-70

N/A
124955

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 114.00 mm

N/A Seal Guides

114 X 8 B-90

N/A
124956

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 114.00 mm

N/A Seal Guides

150x8.00B70

N/A
124957

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 150.00 mm

N/A Seal Guides

150 X 8 B-90

N/A
124958

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 150.00 mm

N/A Seal Guides

160x8.00B70

N/A
124959

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 70

N/A 160.00 mm

N/A Seal Guides

160 X 8 B-90

N/A
124960

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 8.00 mm

N/A 90

N/A 160.00 mm

N/A Seal Guides