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
42.5x3.00B70	N/A 118079	N/A Metric Standard O-Ring	N/A Buna	N/A S43	N/A 2.00 mm	N/A 70	N/A 42.50 mm
42.5 X 2 B-90	N/A 118080	N/A Metric Standard O-Ring	N/A Buna	N/A S43	N/A 2.00 mm	N/A 90	N/A 42.50 mm
43x2.00B70	N/A 118081	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 43.00 mm
43 X 2 B-90	N/A 118082	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 43.00 mm
43.5 X 2 B-70	N/A 118083	N/A Metric Standard O-Ring	N/A Buna	N/A S44	N/A 2.00 mm	N/A 70	N/A 43.50 mm
43.5 X 2 B-90	N/A 118084	N/A Metric Standard O-Ring	N/A Buna	N/A S44	N/A 2.00 mm	N/A 90	N/A 43.50 mm
44x2.00B70	N/A 118085	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 44.00 mm
44 X 2 B-90	N/A 118086	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 44.00 mm
44.5x3.00B70	N/A 118087	N/A Metric Standard O-Ring	N/A Buna	N/A S46	N/A 2.00 mm	N/A 70	N/A 44.50 mm
44.5 X 2 B-90	N/A 118088	N/A Metric Standard O-Ring	N/A Buna	N/A S46	N/A 2.00 mm	N/A 90	N/A 44.50 mm
45x2.00B70	N/A 118089	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 45.00 mm
45 X 2 B-90	N/A 118090	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 45.00 mm
45.5 X 2 B-70	N/A 118091	N/A Metric Standard O-Ring	N/A Buna	N/A S46	N/A 2.00 mm	N/A 70	N/A 45.50 mm
45.5 X 2 B-90	N/A 118092	N/A Metric Standard O-Ring	N/A Buna	N/A S46	N/A 2.00 mm	N/A 90	N/A 45.50 mm
46x2.00B70	N/A 118093	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 46.00 mm
46 X 2 B-90	N/A 118094	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 46.00 mm
47x2.00B70	N/A 118095	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 47.00 mm
47 X 2 B-90	N/A 118096	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 47.00 mm
47.5 X 2 B-70	N/A 118097	N/A Metric Standard O-Ring	N/A Buna	N/A S48	N/A 2.00 mm	N/A 70	N/A 47.50 mm
47.5 X 2 B-90	N/A 118098	N/A Metric Standard O-Ring	N/A Buna	N/A S48	N/A 2.00 mm	N/A 90	N/A 47.50 mm
48x2.00B70	N/A 118099	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 48.00 mm
48 X 2 B-90	N/A 118100	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 48.00 mm
49x2.00B70	N/A 118101	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 49.00 mm
49 X 2 B-90	N/A 118102	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 49.00 mm
49.5x3.00B70	N/A 118103	N/A Metric Standard O-Ring	N/A Buna	N/A S50	N/A 2.00 mm	N/A 70	N/A 49.50 mm

N/A
118079

N/A Metric Standard O-Ring

N/A Buna

N/A S43

N/A 2.00 mm

N/A 70

N/A 42.50 mm

42.5 X 2 B-90

N/A
118080

N/A Metric Standard O-Ring

N/A Buna

N/A S43

N/A 2.00 mm

N/A 90

N/A 42.50 mm

43x2.00B70

N/A
118081

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 43.00 mm

43 X 2 B-90

N/A
118082

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 43.00 mm

43.5 X 2 B-70

N/A
118083

N/A Metric Standard O-Ring

N/A Buna

N/A S44

N/A 2.00 mm

N/A 70

N/A 43.50 mm

43.5 X 2 B-90

N/A
118084

N/A Metric Standard O-Ring

N/A Buna

N/A S44

N/A 2.00 mm

N/A 90

N/A 43.50 mm

44x2.00B70

N/A
118085

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 44.00 mm

44 X 2 B-90

N/A
118086

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 44.00 mm

44.5x3.00B70

N/A
118087

N/A Metric Standard O-Ring

N/A Buna

N/A S46

N/A 2.00 mm

N/A 70

N/A 44.50 mm

44.5 X 2 B-90

N/A
118088

N/A Metric Standard O-Ring

N/A Buna

N/A S46

N/A 2.00 mm

N/A 90

N/A 44.50 mm

45x2.00B70

N/A
118089

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 45.00 mm

45 X 2 B-90

N/A
118090

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 45.00 mm

45.5 X 2 B-70

N/A
118091

N/A Metric Standard O-Ring

N/A Buna

N/A S46

N/A 2.00 mm

N/A 70

N/A 45.50 mm

45.5 X 2 B-90

N/A
118092

N/A Metric Standard O-Ring

N/A Buna

N/A S46

N/A 2.00 mm

N/A 90

N/A 45.50 mm

46x2.00B70

N/A
118093

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 46.00 mm

46 X 2 B-90

N/A
118094

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 46.00 mm

47x2.00B70

N/A
118095

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 47.00 mm

47 X 2 B-90

N/A
118096

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 47.00 mm

47.5 X 2 B-70

N/A
118097

N/A Metric Standard O-Ring

N/A Buna

N/A S48

N/A 2.00 mm

N/A 70

N/A 47.50 mm

47.5 X 2 B-90

N/A
118098

N/A Metric Standard O-Ring

N/A Buna

N/A S48

N/A 2.00 mm

N/A 90

N/A 47.50 mm

48x2.00B70

N/A
118099

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 48.00 mm

48 X 2 B-90

N/A
118100

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 48.00 mm

49x2.00B70

N/A
118101

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 49.00 mm

49 X 2 B-90

N/A
118102

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 49.00 mm

49.5x3.00B70

N/A
118103

N/A Metric Standard O-Ring

N/A Buna

N/A S50

N/A 2.00 mm

N/A 70

N/A 49.50 mm