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
61x2.50B70	N/A 118681	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 61.00 mm
61 X 2.5 B-90	N/A 118682	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 61.00 mm
62x2.50B70	N/A 118683	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 62.00 mm
62 X 2.5 B-90	N/A 118684	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 62.00 mm
63x2.50B70	N/A 118685	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 63.00 mm
63 X 2.5 B-90	N/A 118686	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 63.00 mm
64x2.50B70	N/A 118687	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 64.00 mm
64 X 2.5 B-90	N/A 118688	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 64.00 mm
65x2.50B70	N/A 118689	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 65.00 mm
65 X 2.5 B-90	N/A 118690	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 65.00 mm
66x2.50B70	N/A 118691	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 66.00 mm
66 X 2.5 B-90	N/A 118692	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 66.00 mm
67x2.50B70	N/A 118693	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 67.00 mm
67 X 2.5 B-90	N/A 118694	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 67.00 mm
68x2.50B70	N/A 118695	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 68.00 mm
68 X 2.5 B-90	N/A 118696	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 68.00 mm
69x2.50B70	N/A 118697	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 69.00 mm
69 X 2.5 B-90	N/A 118698	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 69.00 mm
70x2.50B70	N/A 118699	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 70.00 mm
70 X 2.5 B-90	N/A 118700	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 70.00 mm
71x2.50B70	N/A 118701	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 71.00 mm
71 X 2.5 B-90	N/A 118702	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 71.00 mm
72x2.50B70	N/A 118703	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 72.00 mm
72 X 2.5 B-90	N/A 118704	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 90	N/A 72.00 mm
73x2.50B70	N/A 118705	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.50 mm	N/A 70	N/A 73.00 mm

N/A
118681

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 61.00 mm

61 X 2.5 B-90

N/A
118682

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 61.00 mm

62x2.50B70

N/A
118683

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 62.00 mm

62 X 2.5 B-90

N/A
118684

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 62.00 mm

63x2.50B70

N/A
118685

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 63.00 mm

63 X 2.5 B-90

N/A
118686

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 63.00 mm

64x2.50B70

N/A
118687

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 64.00 mm

64 X 2.5 B-90

N/A
118688

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 64.00 mm

65x2.50B70

N/A
118689

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 65.00 mm

65 X 2.5 B-90

N/A
118690

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 65.00 mm

66x2.50B70

N/A
118691

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 66.00 mm

66 X 2.5 B-90

N/A
118692

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 66.00 mm

67x2.50B70

N/A
118693

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 67.00 mm

67 X 2.5 B-90

N/A
118694

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 67.00 mm

68x2.50B70

N/A
118695

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 68.00 mm

68 X 2.5 B-90

N/A
118696

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 68.00 mm

69x2.50B70

N/A
118697

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 69.00 mm

69 X 2.5 B-90

N/A
118698

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 69.00 mm

70x2.50B70

N/A
118699

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 70.00 mm

70 X 2.5 B-90

N/A
118700

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 70.00 mm

71x2.50B70

N/A
118701

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 71.00 mm

71 X 2.5 B-90

N/A
118702

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 71.00 mm

72x2.50B70

N/A
118703

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 72.00 mm

72 X 2.5 B-90

N/A
118704

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 90

N/A 72.00 mm

73x2.50B70

N/A
118705

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.50 mm

N/A 70

N/A 73.00 mm