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
99 X 3.5 B-90	N/A 120168	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 99.00 mm
100x3.50B70	N/A 120169	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 100.00 mm
100 X 3.5 B-90	N/A 120170	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 100.00 mm
101 X 3.5 B-70	N/A 120171	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 101.00 mm
101 X 3.5 B-90	N/A 120172	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 101.00 mm
102x3.50B70	N/A 120173	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 102.00 mm
102 X 3.5 B-90	N/A 120174	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 102.00 mm
103x3.50B70	N/A 120175	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 103.00 mm
103 X 3.5 B-90	N/A 120176	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 103.00 mm
104 X 3.5 B-70	N/A 120177	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 104.00 mm
104 X 3.5 B-90	N/A 120178	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 104.00 mm
105x3.50B70	N/A 120179	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 105.00 mm
105 X 3.5 B-90	N/A 120180	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 105.00 mm
106x3.50B70	N/A 120181	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 106.00 mm
106 X 3.5 B-90	N/A 120182	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 106.00 mm
107 X 3.5 B-70	N/A 120183	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 107.00 mm
107 X 3.5 B-90	N/A 120184	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 107.00 mm
108x3.50B70	N/A 120185	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 108.00 mm
108 X 3.5 B-90	N/A 120186	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 108.00 mm
109x3.50B70	N/A 120187	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 109.00 mm
109 X 3.5 B-90	N/A 120188	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 109.00 mm
110x3.50B70	N/A 120189	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 110.00 mm
110 X 3.5 B-90	N/A 120190	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 110.00 mm
111x3.50B70	N/A 120191	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 70	N/A 111.00 mm
111 X 3.5 B-90	N/A 120192	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.50 mm	N/A 90	N/A 111.00 mm

N/A
120168

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 99.00 mm

100x3.50B70

N/A
120169

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 100.00 mm

100 X 3.5 B-90

N/A
120170

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 100.00 mm

101 X 3.5 B-70

N/A
120171

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 101.00 mm

101 X 3.5 B-90

N/A
120172

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 101.00 mm

102x3.50B70

N/A
120173

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 102.00 mm

102 X 3.5 B-90

N/A
120174

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 102.00 mm

103x3.50B70

N/A
120175

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 103.00 mm

103 X 3.5 B-90

N/A
120176

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 103.00 mm

104 X 3.5 B-70

N/A
120177

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 104.00 mm

104 X 3.5 B-90

N/A
120178

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 104.00 mm

105x3.50B70

N/A
120179

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 105.00 mm

105 X 3.5 B-90

N/A
120180

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 105.00 mm

106x3.50B70

N/A
120181

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 106.00 mm

106 X 3.5 B-90

N/A
120182

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 106.00 mm

107 X 3.5 B-70

N/A
120183

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 107.00 mm

107 X 3.5 B-90

N/A
120184

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 107.00 mm

108x3.50B70

N/A
120185

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 108.00 mm

108 X 3.5 B-90

N/A
120186

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 108.00 mm

109x3.50B70

N/A
120187

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 109.00 mm

109 X 3.5 B-90

N/A
120188

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 109.00 mm

110x3.50B70

N/A
120189

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 110.00 mm

110 X 3.5 B-90

N/A
120190

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 110.00 mm

111x3.50B70

N/A
120191

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 70

N/A 111.00 mm

111 X 3.5 B-90

N/A
120192

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.50 mm

N/A 90

N/A 111.00 mm