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
49.5 X 2 B-90	N/A 118104	N/A Metric Standard O-Ring	N/A Buna	N/A S50	N/A 2.00 mm	N/A 90	N/A 49.50 mm
50x2.00B70	N/A 118105	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 50.00 mm
50 X 2 B-90	N/A 118106	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 50.00 mm
51x2.00B70	N/A 118107	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 51.00 mm
51 X 2 B-90	N/A 118108	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 51.00 mm
52x2.00B70	N/A 118109	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 52.00 mm
52 X 2 B-90	N/A 118110	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 52.00 mm
52.5 X 2 B-70	N/A 118111	N/A Metric Standard O-Ring	N/A Buna	N/A S53	N/A 2.00 mm	N/A 70	N/A 52.50 mm
52.5 X 2 B-90	N/A 118112	N/A Metric Standard O-Ring	N/A Buna	N/A S53	N/A 2.00 mm	N/A 90	N/A 52.50 mm
53x2.00B70	N/A 118113	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 53.00 mm
53 X 2 B-90	N/A 118114	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 53.00 mm
54x2.00B70	N/A 118115	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 54.00 mm
54 X 2 B-90	N/A 118116	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 54.00 mm
54.5x3.00B70	N/A 118117	N/A Metric Standard O-Ring	N/A Buna	N/A S55	N/A 2.00 mm	N/A 70	N/A 54.50 mm
54.5 X 2 B-90	N/A 118118	N/A Metric Standard O-Ring	N/A Buna	N/A S55	N/A 2.00 mm	N/A 90	N/A 54.50 mm
55x2.00B70	N/A 118119	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 55.00 mm
55 X 2 B-90	N/A 118120	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 55.00 mm
55.5 X 2 B-70	N/A 118121	N/A Metric Standard O-Ring	N/A Buna	N/A S56	N/A 2.00 mm	N/A 70	N/A 55.50 mm
55.5 X 2 B-90	N/A 118122	N/A Metric Standard O-Ring	N/A Buna	N/A S56	N/A 2.00 mm	N/A 90	N/A 55.50 mm
56x2.00B70	N/A 118123	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 56.00 mm
56 X 2 B-90	N/A 118124	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 56.00 mm
57x2.00B70	N/A 118125	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 57.00 mm
57 X 2 B-90	N/A 118126	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 57.00 mm
58x2.00B70	N/A 118127	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 58.00 mm
58 X 2 B-90	N/A 118128	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 58.00 mm

N/A
118104

N/A Metric Standard O-Ring

N/A Buna

N/A S50

N/A 2.00 mm

N/A 90

N/A 49.50 mm

50x2.00B70

N/A
118105

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 50.00 mm

50 X 2 B-90

N/A
118106

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 50.00 mm

51x2.00B70

N/A
118107

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 51.00 mm

51 X 2 B-90

N/A
118108

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 51.00 mm

52x2.00B70

N/A
118109

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 52.00 mm

52 X 2 B-90

N/A
118110

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 52.00 mm

52.5 X 2 B-70

N/A
118111

N/A Metric Standard O-Ring

N/A Buna

N/A S53

N/A 2.00 mm

N/A 70

N/A 52.50 mm

52.5 X 2 B-90

N/A
118112

N/A Metric Standard O-Ring

N/A Buna

N/A S53

N/A 2.00 mm

N/A 90

N/A 52.50 mm

53x2.00B70

N/A
118113

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 53.00 mm

53 X 2 B-90

N/A
118114

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 53.00 mm

54x2.00B70

N/A
118115

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 54.00 mm

54 X 2 B-90

N/A
118116

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 54.00 mm

54.5x3.00B70

N/A
118117

N/A Metric Standard O-Ring

N/A Buna

N/A S55

N/A 2.00 mm

N/A 70

N/A 54.50 mm

54.5 X 2 B-90

N/A
118118

N/A Metric Standard O-Ring

N/A Buna

N/A S55

N/A 2.00 mm

N/A 90

N/A 54.50 mm

55x2.00B70

N/A
118119

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 55.00 mm

55 X 2 B-90

N/A
118120

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 55.00 mm

55.5 X 2 B-70

N/A
118121

N/A Metric Standard O-Ring

N/A Buna

N/A S56

N/A 2.00 mm

N/A 70

N/A 55.50 mm

55.5 X 2 B-90

N/A
118122

N/A Metric Standard O-Ring

N/A Buna

N/A S56

N/A 2.00 mm

N/A 90

N/A 55.50 mm

56x2.00B70

N/A
118123

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 56.00 mm

56 X 2 B-90

N/A
118124

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 56.00 mm

57x2.00B70

N/A
118125

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 57.00 mm

57 X 2 B-90

N/A
118126

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 57.00 mm

58x2.00B70

N/A
118127

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 58.00 mm

58 X 2 B-90

N/A
118128

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 58.00 mm