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
29x2.00B70	N/A 118025	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 29.00 mm
29 X 2 B-90	N/A 118026	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 29.00 mm
29.5x2.00B70	N/A 118027	N/A Metric Standard O-Ring	N/A Buna	N/A S30	N/A 2.00 mm	N/A 70	N/A 29.50 mm
29.5 X 2 B-90	N/A 118028	N/A Metric Standard O-Ring	N/A Buna	N/A S30	N/A 2.00 mm	N/A 90	N/A 29.50 mm
30x2.00B70	N/A 118029	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 30.00 mm
30 X 2 B-90	N/A 118030	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 30.00 mm
30.5x2.00B70	N/A 118031	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 30.50 mm
30.5 X 2 B-90	N/A 118032	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 30.50 mm
31x2.00B70	N/A 118033	N/A Metric Standard O-Ring	N/A Buna	N/A S31.5	N/A 2.00 mm	N/A 70	N/A 31.00 mm
31 X 2 B-90	N/A 118034	N/A Metric Standard O-Ring	N/A Buna	N/A S31.5	N/A 2.00 mm	N/A 90	N/A 31.00 mm
31.5x2.00B70	N/A 118035	N/A Metric Standard O-Ring	N/A Buna	N/A S32	N/A 2.00 mm	N/A 70	N/A 31.50 mm
31.5 X 2 B-90	N/A 118036	N/A Metric Standard O-Ring	N/A Buna	N/A S32	N/A 2.00 mm	N/A 90	N/A 31.50 mm
32x2.00B70	N/A 118037	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 32.00 mm
32 X 2 B-90	N/A 118038	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 32.00 mm
32.5x2.00B70	N/A 118039	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 32.50 mm
32.5 X 2 B-90	N/A 118040	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 32.50 mm
33x2.00B70	N/A 118041	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 33.00 mm
33 X 2 B-90	N/A 118042	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 33.00 mm
33.5x2.00B70	N/A 118043	N/A Metric Standard O-Ring	N/A Buna	N/A S34	N/A 2.00 mm	N/A 70	N/A 33.50 mm
33.5 X 2 B-90	N/A 118044	N/A Metric Standard O-Ring	N/A Buna	N/A S34	N/A 2.00 mm	N/A 90	N/A 33.50 mm
34x2.00B70	N/A 118045	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 34.00 mm
34 X 2 B-90	N/A 118046	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 34.00 mm
34.5x2.00B70	N/A 118047	N/A Metric Standard O-Ring	N/A Buna	N/A S35	N/A 2.00 mm	N/A 70	N/A 34.50 mm
34.5 X 2 B-90	N/A 118048	N/A Metric Standard O-Ring	N/A Buna	N/A S35	N/A 2.00 mm	N/A 90	N/A 34.50 mm
35x2.00B70	N/A 118049	N/A Metric Standard O-Ring	N/A Buna	N/A S35.5	N/A 2.00 mm	N/A 70	N/A 35.00 mm

N/A
118025

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 29.00 mm

29 X 2 B-90

N/A
118026

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 29.00 mm

29.5x2.00B70

N/A
118027

N/A Metric Standard O-Ring

N/A Buna

N/A S30

N/A 2.00 mm

N/A 70

N/A 29.50 mm

29.5 X 2 B-90

N/A
118028

N/A Metric Standard O-Ring

N/A Buna

N/A S30

N/A 2.00 mm

N/A 90

N/A 29.50 mm

30x2.00B70

N/A
118029

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 30.00 mm

30 X 2 B-90

N/A
118030

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 30.00 mm

30.5x2.00B70

N/A
118031

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 30.50 mm

30.5 X 2 B-90

N/A
118032

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 30.50 mm

31x2.00B70

N/A
118033

N/A Metric Standard O-Ring

N/A Buna

N/A S31.5

N/A 2.00 mm

N/A 70

N/A 31.00 mm

31 X 2 B-90

N/A
118034

N/A Metric Standard O-Ring

N/A Buna

N/A S31.5

N/A 2.00 mm

N/A 90

N/A 31.00 mm

31.5x2.00B70

N/A
118035

N/A Metric Standard O-Ring

N/A Buna

N/A S32

N/A 2.00 mm

N/A 70

N/A 31.50 mm

31.5 X 2 B-90

N/A
118036

N/A Metric Standard O-Ring

N/A Buna

N/A S32

N/A 2.00 mm

N/A 90

N/A 31.50 mm

32x2.00B70

N/A
118037

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 32.00 mm

32 X 2 B-90

N/A
118038

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 32.00 mm

32.5x2.00B70

N/A
118039

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 32.50 mm

32.5 X 2 B-90

N/A
118040

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 32.50 mm

33x2.00B70

N/A
118041

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 33.00 mm

33 X 2 B-90

N/A
118042

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 33.00 mm

33.5x2.00B70

N/A
118043

N/A Metric Standard O-Ring

N/A Buna

N/A S34

N/A 2.00 mm

N/A 70

N/A 33.50 mm

33.5 X 2 B-90

N/A
118044

N/A Metric Standard O-Ring

N/A Buna

N/A S34

N/A 2.00 mm

N/A 90

N/A 33.50 mm

34x2.00B70

N/A
118045

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 34.00 mm

34 X 2 B-90

N/A
118046

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 34.00 mm

34.5x2.00B70

N/A
118047

N/A Metric Standard O-Ring

N/A Buna

N/A S35

N/A 2.00 mm

N/A 70

N/A 34.50 mm

34.5 X 2 B-90

N/A
118048

N/A Metric Standard O-Ring

N/A Buna

N/A S35

N/A 2.00 mm

N/A 90

N/A 34.50 mm

35x2.00B70

N/A
118049

N/A Metric Standard O-Ring

N/A Buna

N/A S35.5

N/A 2.00 mm

N/A 70

N/A 35.00 mm