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
135 X 3 B-90	N/A 119566	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 135.00 mm
136 X 3 B-70	N/A 119567	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 136.00 mm
136 X 3 B-90	N/A 119568	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 136.00 mm
137 X 3 B-70	N/A 119569	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 137.00 mm
137 X 3 B-90	N/A 119570	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 137.00 mm
138 X 3 B-70	N/A 119571	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 138.00 mm
138 X 3 B-90	N/A 119572	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 138.00 mm
139 X 3 B-70	N/A 119573	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 139.00 mm
139 X 3 B-90	N/A 119574	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 139.00 mm
139.5 X 3 B-70	N/A 119575	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 139.50 mm
139.5 X 3 B-90	N/A 119576	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 139.50 mm
140 X 3 B-70	N/A 119577	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 140.00 mm
140 X 3 B-90	N/A 119578	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 140.00 mm
141 X 3 B-70	N/A 119579	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 141.00 mm
141 X 3 B-90	N/A 119580	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 141.00 mm
142 X 3 B-70	N/A 119581	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 142.00 mm
142 X 3 B-90	N/A 119582	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 142.00 mm
143 X 3 B-70	N/A 119583	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 143.00 mm
143 X 3 B-90	N/A 119584	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 143.00 mm
144 X 3 B-70	N/A 119585	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 144.00 mm
144 X 3 B-90	N/A 119586	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 144.00 mm
144.5 X 3 B-70	N/A 119587	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 144.50 mm
144.5 X 3 B-90	N/A 119588	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 144.50 mm
145 X 3 B-70	N/A 119589	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 70	N/A 145.00 mm
145 X 3 B-90	N/A 119590	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 3.00 mm	N/A 90	N/A 145.00 mm

N/A
119566

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 135.00 mm

136 X 3 B-70

N/A
119567

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 136.00 mm

136 X 3 B-90

N/A
119568

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 136.00 mm

137 X 3 B-70

N/A
119569

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 137.00 mm

137 X 3 B-90

N/A
119570

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 137.00 mm

138 X 3 B-70

N/A
119571

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 138.00 mm

138 X 3 B-90

N/A
119572

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 138.00 mm

139 X 3 B-70

N/A
119573

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 139.00 mm

139 X 3 B-90

N/A
119574

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 139.00 mm

139.5 X 3 B-70

N/A
119575

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 139.50 mm

139.5 X 3 B-90

N/A
119576

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 139.50 mm

140 X 3 B-70

N/A
119577

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 140.00 mm

140 X 3 B-90

N/A
119578

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 140.00 mm

141 X 3 B-70

N/A
119579

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 141.00 mm

141 X 3 B-90

N/A
119580

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 141.00 mm

142 X 3 B-70

N/A
119581

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 142.00 mm

142 X 3 B-90

N/A
119582

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 142.00 mm

143 X 3 B-70

N/A
119583

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 143.00 mm

143 X 3 B-90

N/A
119584

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 143.00 mm

144 X 3 B-70

N/A
119585

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 144.00 mm

144 X 3 B-90

N/A
119586

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 144.00 mm

144.5 X 3 B-70

N/A
119587

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 144.50 mm

144.5 X 3 B-90

N/A
119588

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 144.50 mm

145 X 3 B-70

N/A
119589

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 70

N/A 145.00 mm

145 X 3 B-90

N/A
119590

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 3.00 mm

N/A 90

N/A 145.00 mm