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
30.5 X 1 B-90	N/A 117196	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 30.50 mm	N/A Seal Guides
31.8 X 1 B-70	N/A 117197	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 31.80 mm	N/A Seal Guides
31.8 X 1 B-90	N/A 117198	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 31.80 mm	N/A Seal Guides
32 X 1 B-70	N/A 117199	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 32.00 mm	N/A Seal Guides
32 X 1 B-90	N/A 117200	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 32.00 mm	N/A Seal Guides
39 X 1 B-70	N/A 117201	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 39.00 mm	N/A Seal Guides
39 X 1 B-90	N/A 117202	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 39.00 mm	N/A Seal Guides
42 X 1 B-70	N/A 117203	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 42.00 mm	N/A Seal Guides
42 X 1 B-90	N/A 117204	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 42.00 mm	N/A Seal Guides
60 X 1 B-70	N/A 117205	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 70	N/A 60.00 mm	N/A Seal Guides
60 X 1 B-90	N/A 117206	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.00 mm	N/A 90	N/A 60.00 mm	N/A Seal Guides
74 X 1.02 B-70	N/A 117207	N/A Metric Standard O-Ring	N/A Buna	N/A 1	N/A 1.02 mm	N/A 70	N/A 74.00 mm	N/A Seal Guides
74 X 1.02 B-90	N/A 117208	N/A Metric Standard O-Ring	N/A Buna	N/A 1	N/A 1.02 mm	N/A 90	N/A 74.00 mm	N/A Seal Guides
1.78 X 1.02 B-70	N/A 117209	N/A Metric Standard O-Ring	N/A Buna	N/A BS606	N/A 1.02 mm	N/A 70	N/A 1.78 mm	N/A Seal Guides
1.78 X 1.02 B-90	N/A 117210	N/A Metric Standard O-Ring	N/A Buna	N/A BS606	N/A 1.02 mm	N/A 90	N/A 1.78 mm	N/A Seal Guides
2.54 X 1.02 B-70	N/A 117211	N/A Metric Standard O-Ring	N/A Buna	N/A BS607	N/A 1.02 mm	N/A 70	N/A 2.54 mm	N/A Seal Guides
2.54 X 1.02 B-90	N/A 117212	N/A Metric Standard O-Ring	N/A Buna	N/A BS607	N/A 1.02 mm	N/A 90	N/A 2.54 mm	N/A Seal Guides
42.1 X 1.15 B-70	N/A 117213	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.15 mm	N/A 70	N/A 42.10 mm	N/A Seal Guides
42.1 X 1.15 B-90	N/A 117214	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.15 mm	N/A 90	N/A 42.10 mm	N/A Seal Guides
4.32 X 1.19 B-70	N/A 117215	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.19 mm	N/A 70	N/A 4.32 mm	N/A Seal Guides
4.32 X 1.19 B-90	N/A 117216	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.19 mm	N/A 90	N/A 4.32 mm	N/A Seal Guides
2.5 X 1.2 B-70	N/A 117217	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 70	N/A 2.50 mm	N/A Seal Guides
2.5 X 1.2 B-90	N/A 117218	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 90	N/A 2.50 mm	N/A Seal Guides
2.6 X 1.2 B-70	N/A 117219	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 70	N/A 2.60 mm	N/A Seal Guides
2.6 X 1.2 B-90	N/A 117220	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.20 mm	N/A 90	N/A 2.60 mm	N/A Seal Guides

N/A
117196

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 30.50 mm

N/A Seal Guides

31.8 X 1 B-70

N/A
117197

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 31.80 mm

N/A Seal Guides

31.8 X 1 B-90

N/A
117198

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 31.80 mm

N/A Seal Guides

32 X 1 B-70

N/A
117199

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 32.00 mm

N/A Seal Guides

32 X 1 B-90

N/A
117200

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 32.00 mm

N/A Seal Guides

39 X 1 B-70

N/A
117201

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 39.00 mm

N/A Seal Guides

39 X 1 B-90

N/A
117202

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 39.00 mm

N/A Seal Guides

42 X 1 B-70

N/A
117203

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 42.00 mm

N/A Seal Guides

42 X 1 B-90

N/A
117204

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 42.00 mm

N/A Seal Guides

60 X 1 B-70

N/A
117205

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 70

N/A 60.00 mm

N/A Seal Guides

60 X 1 B-90

N/A
117206

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.00 mm

N/A 90

N/A 60.00 mm

N/A Seal Guides

74 X 1.02 B-70

N/A
117207

N/A Metric Standard O-Ring

N/A Buna

N/A 1

N/A 1.02 mm

N/A 70

N/A 74.00 mm

N/A Seal Guides

74 X 1.02 B-90

N/A
117208

N/A Metric Standard O-Ring

N/A Buna

N/A 1

N/A 1.02 mm

N/A 90

N/A 74.00 mm

N/A Seal Guides

1.78 X 1.02 B-70

N/A
117209

N/A Metric Standard O-Ring

N/A Buna

N/A BS606

N/A 1.02 mm

N/A 70

N/A 1.78 mm

N/A Seal Guides

1.78 X 1.02 B-90

N/A
117210

N/A Metric Standard O-Ring

N/A Buna

N/A BS606

N/A 1.02 mm

N/A 90

N/A 1.78 mm

N/A Seal Guides

2.54 X 1.02 B-70

N/A
117211

N/A Metric Standard O-Ring

N/A Buna

N/A BS607

N/A 1.02 mm

N/A 70

N/A 2.54 mm

N/A Seal Guides

2.54 X 1.02 B-90

N/A
117212

N/A Metric Standard O-Ring

N/A Buna

N/A BS607

N/A 1.02 mm

N/A 90

N/A 2.54 mm

N/A Seal Guides

42.1 X 1.15 B-70

N/A
117213

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.15 mm

N/A 70

N/A 42.10 mm

N/A Seal Guides

42.1 X 1.15 B-90

N/A
117214

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.15 mm

N/A 90

N/A 42.10 mm

N/A Seal Guides

4.32 X 1.19 B-70

N/A
117215

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.19 mm

N/A 70

N/A 4.32 mm

N/A Seal Guides

4.32 X 1.19 B-90

N/A
117216

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.19 mm

N/A 90

N/A 4.32 mm

N/A Seal Guides

2.5 X 1.2 B-70

N/A
117217

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 70

N/A 2.50 mm

N/A Seal Guides

2.5 X 1.2 B-90

N/A
117218

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 90

N/A 2.50 mm

N/A Seal Guides

2.6 X 1.2 B-70

N/A
117219

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 70

N/A 2.60 mm

N/A Seal Guides

2.6 X 1.2 B-90

N/A
117220

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.20 mm

N/A 90

N/A 2.60 mm

N/A Seal Guides