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
71 X 6 B-90	N/A 124178	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 71.00 mm	N/A Seal Guides
72x6.00B70	N/A 124179	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 72.00 mm	N/A Seal Guides
72 X 6 B-90	N/A 124180	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 72.00 mm	N/A Seal Guides
73x6.00B70	N/A 124181	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 73.00 mm	N/A Seal Guides
73 X 6 B-90	N/A 124182	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 73.00 mm	N/A Seal Guides
74x6.00B70	N/A 124183	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 74.00 mm	N/A Seal Guides
74 X 6 B-90	N/A 124184	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 74.00 mm	N/A Seal Guides
75x6.00B70	N/A 124185	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 75.00 mm	N/A Seal Guides
75 X 6 B-90	N/A 124186	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 75.00 mm	N/A Seal Guides
76x6.00B70	N/A 124187	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 76.00 mm	N/A Seal Guides
76 X 6 B-90	N/A 124188	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 76.00 mm	N/A Seal Guides
78x6.00B70	N/A 124189	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 78.00 mm	N/A Seal Guides
78 X 6 B-90	N/A 124190	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 78.00 mm	N/A Seal Guides
78.5 X 6 B-70	N/A 124191	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 78.50 mm	N/A Seal Guides
78.5 X 6 B-90	N/A 124192	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 78.50 mm	N/A Seal Guides
79x6.00B70	N/A 124193	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 79.00 mm	N/A Seal Guides
79 X 6 B-90	N/A 124194	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 79.00 mm	N/A Seal Guides
80x6.00B70	N/A 124195	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 80.00 mm	N/A Seal Guides
80 X 6 B-90	N/A 124196	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 80.00 mm	N/A Seal Guides
81x6.00B70	N/A 124197	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 81.00 mm	N/A Seal Guides
81 X 6 B-90	N/A 124198	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 81.00 mm	N/A Seal Guides
81.5x6.00B70	N/A 124199	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 81.50 mm	N/A Seal Guides
81.5 X 6 B-90	N/A 124200	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 81.50 mm	N/A Seal Guides
84x6.00B70	N/A 124201	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 84.00 mm	N/A Seal Guides
84 X 6 B-90	N/A 124202	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 84.00 mm	N/A Seal Guides

N/A
124178

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 71.00 mm

N/A Seal Guides

72x6.00B70

N/A
124179

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 72.00 mm

N/A Seal Guides

72 X 6 B-90

N/A
124180

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 72.00 mm

N/A Seal Guides

73x6.00B70

N/A
124181

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 73.00 mm

N/A Seal Guides

73 X 6 B-90

N/A
124182

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 73.00 mm

N/A Seal Guides

74x6.00B70

N/A
124183

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 74.00 mm

N/A Seal Guides

74 X 6 B-90

N/A
124184

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 74.00 mm

N/A Seal Guides

75x6.00B70

N/A
124185

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 75.00 mm

N/A Seal Guides

75 X 6 B-90

N/A
124186

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 75.00 mm

N/A Seal Guides

76x6.00B70

N/A
124187

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 76.00 mm

N/A Seal Guides

76 X 6 B-90

N/A
124188

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 76.00 mm

N/A Seal Guides

78x6.00B70

N/A
124189

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 78.00 mm

N/A Seal Guides

78 X 6 B-90

N/A
124190

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 78.00 mm

N/A Seal Guides

78.5 X 6 B-70

N/A
124191

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 78.50 mm

N/A Seal Guides

78.5 X 6 B-90

N/A
124192

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 78.50 mm

N/A Seal Guides

79x6.00B70

N/A
124193

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 79.00 mm

N/A Seal Guides

79 X 6 B-90

N/A
124194

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 79.00 mm

N/A Seal Guides

80x6.00B70

N/A
124195

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 80.00 mm

N/A Seal Guides

80 X 6 B-90

N/A
124196

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 80.00 mm

N/A Seal Guides

81x6.00B70

N/A
124197

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 81.00 mm

N/A Seal Guides

81 X 6 B-90

N/A
124198

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 81.00 mm

N/A Seal Guides

81.5x6.00B70

N/A
124199

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 81.50 mm

N/A Seal Guides

81.5 X 6 B-90

N/A
124200

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 81.50 mm

N/A Seal Guides

84x6.00B70

N/A
124201

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 84.00 mm

N/A Seal Guides

84 X 6 B-90

N/A
124202

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 84.00 mm

N/A Seal Guides