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
115 X 2 B-90	N/A 118254	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 115.00 mm
119.5 X 2 B-70	N/A 118255	N/A Metric Standard O-Ring	N/A Buna	N/A S120	N/A 2.00 mm	N/A 70	N/A 119.50 mm
119.5 X 2 B-90	N/A 118256	N/A Metric Standard O-Ring	N/A Buna	N/A S120	N/A 2.00 mm	N/A 90	N/A 119.50 mm
120x2.00B70	N/A 118257	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 120.00 mm
120 X 2 B-90	N/A 118258	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 120.00 mm
124.5 X 2 B-70	N/A 118259	N/A Metric Standard O-Ring	N/A Buna	N/A S125	N/A 2.00 mm	N/A 70	N/A 124.50 mm
124.5 X 2 B-90	N/A 118260	N/A Metric Standard O-Ring	N/A Buna	N/A S125	N/A 2.00 mm	N/A 90	N/A 124.50 mm
125.6 X 2 B-70	N/A 118261	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 125.60 mm
125.6 X 2 B-90	N/A 118262	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 125.60 mm
129.5 X 2 B-70	N/A 118263	N/A Metric Standard O-Ring	N/A Buna	N/A S130	N/A 2.00 mm	N/A 70	N/A 129.50 mm
129.5 X 2 B-90	N/A 118264	N/A Metric Standard O-Ring	N/A Buna	N/A S130	N/A 2.00 mm	N/A 90	N/A 129.50 mm
130x2.00B70	N/A 118265	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 130.00 mm
130 X 2 B-90	N/A 118266	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 130.00 mm
131.5 X 2 B-70	N/A 118267	N/A Metric Standard O-Ring	N/A Buna	N/A S132	N/A 2.00 mm	N/A 70	N/A 131.50 mm
131.5 X 2 B-90	N/A 118268	N/A Metric Standard O-Ring	N/A Buna	N/A S132	N/A 2.00 mm	N/A 90	N/A 131.50 mm
134.5 X 2 B-70	N/A 118269	N/A Metric Standard O-Ring	N/A Buna	N/A S135	N/A 2.00 mm	N/A 70	N/A 134.50 mm
134.5 X 2 B-90	N/A 118270	N/A Metric Standard O-Ring	N/A Buna	N/A S135	N/A 2.00 mm	N/A 90	N/A 134.50 mm
139.5 X 2 B-70	N/A 118271	N/A Metric Standard O-Ring	N/A Buna	N/A S140	N/A 2.00 mm	N/A 70	N/A 139.50 mm
139.5 X 2 B-90	N/A 118272	N/A Metric Standard O-Ring	N/A Buna	N/A S140	N/A 2.00 mm	N/A 90	N/A 139.50 mm
140x2.00B70	N/A 118273	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 70	N/A 140.00 mm
140 X 2 B-90	N/A 118274	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 2.00 mm	N/A 90	N/A 140.00 mm
144.5 X 2 B-70	N/A 118275	N/A Metric Standard O-Ring	N/A Buna	N/A S145	N/A 2.00 mm	N/A 70	N/A 144.50 mm
144.5 X 2 B-90	N/A 118276	N/A Metric Standard O-Ring	N/A Buna	N/A S145	N/A 2.00 mm	N/A 90	N/A 144.50 mm
149.5 X 2 B-70	N/A 118277	N/A Metric Standard O-Ring	N/A Buna	N/A S150	N/A 2.00 mm	N/A 70	N/A 149.50 mm
149.5 X 2 B-90	N/A 118278	N/A Metric Standard O-Ring	N/A Buna	N/A S150	N/A 2.00 mm	N/A 90	N/A 149.50 mm

N/A
118254

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 115.00 mm

119.5 X 2 B-70

N/A
118255

N/A Metric Standard O-Ring

N/A Buna

N/A S120

N/A 2.00 mm

N/A 70

N/A 119.50 mm

119.5 X 2 B-90

N/A
118256

N/A Metric Standard O-Ring

N/A Buna

N/A S120

N/A 2.00 mm

N/A 90

N/A 119.50 mm

120x2.00B70

N/A
118257

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 120.00 mm

120 X 2 B-90

N/A
118258

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 120.00 mm

124.5 X 2 B-70

N/A
118259

N/A Metric Standard O-Ring

N/A Buna

N/A S125

N/A 2.00 mm

N/A 70

N/A 124.50 mm

124.5 X 2 B-90

N/A
118260

N/A Metric Standard O-Ring

N/A Buna

N/A S125

N/A 2.00 mm

N/A 90

N/A 124.50 mm

125.6 X 2 B-70

N/A
118261

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 125.60 mm

125.6 X 2 B-90

N/A
118262

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 125.60 mm

129.5 X 2 B-70

N/A
118263

N/A Metric Standard O-Ring

N/A Buna

N/A S130

N/A 2.00 mm

N/A 70

N/A 129.50 mm

129.5 X 2 B-90

N/A
118264

N/A Metric Standard O-Ring

N/A Buna

N/A S130

N/A 2.00 mm

N/A 90

N/A 129.50 mm

130x2.00B70

N/A
118265

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 130.00 mm

130 X 2 B-90

N/A
118266

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 130.00 mm

131.5 X 2 B-70

N/A
118267

N/A Metric Standard O-Ring

N/A Buna

N/A S132

N/A 2.00 mm

N/A 70

N/A 131.50 mm

131.5 X 2 B-90

N/A
118268

N/A Metric Standard O-Ring

N/A Buna

N/A S132

N/A 2.00 mm

N/A 90

N/A 131.50 mm

134.5 X 2 B-70

N/A
118269

N/A Metric Standard O-Ring

N/A Buna

N/A S135

N/A 2.00 mm

N/A 70

N/A 134.50 mm

134.5 X 2 B-90

N/A
118270

N/A Metric Standard O-Ring

N/A Buna

N/A S135

N/A 2.00 mm

N/A 90

N/A 134.50 mm

139.5 X 2 B-70

N/A
118271

N/A Metric Standard O-Ring

N/A Buna

N/A S140

N/A 2.00 mm

N/A 70

N/A 139.50 mm

139.5 X 2 B-90

N/A
118272

N/A Metric Standard O-Ring

N/A Buna

N/A S140

N/A 2.00 mm

N/A 90

N/A 139.50 mm

140x2.00B70

N/A
118273

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 70

N/A 140.00 mm

140 X 2 B-90

N/A
118274

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 2.00 mm

N/A 90

N/A 140.00 mm

144.5 X 2 B-70

N/A
118275

N/A Metric Standard O-Ring

N/A Buna

N/A S145

N/A 2.00 mm

N/A 70

N/A 144.50 mm

144.5 X 2 B-90

N/A
118276

N/A Metric Standard O-Ring

N/A Buna

N/A S145

N/A 2.00 mm

N/A 90

N/A 144.50 mm

149.5 X 2 B-70

N/A
118277

N/A Metric Standard O-Ring

N/A Buna

N/A S150

N/A 2.00 mm

N/A 70

N/A 149.50 mm

149.5 X 2 B-90

N/A
118278

N/A Metric Standard O-Ring

N/A Buna

N/A S150

N/A 2.00 mm

N/A 90

N/A 149.50 mm