• Metric 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.

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Cross Section Width (mm)

Durometer

Inside Diameter (mm)

Item #

IntegrationID

Type

Material

Cross Reference

Cross Section Width

Durometer

Inside Diameter

N/A
120995 		N/A Metric Standard O-Ring N/A Buna N/A 247 N/A 3.53 mm N/A 70 N/A 117.07 mm
N/A
120996 		N/A Metric Standard O-Ring N/A Buna N/A 247 N/A 3.53 mm N/A 90 N/A 117.07 mm
N/A
120997 		N/A Metric Standard O-Ring N/A Buna N/A 248 N/A 3.53 mm N/A 70 N/A 120.24 mm
N/A
120998 		N/A Metric Standard O-Ring N/A Buna N/A 248 N/A 3.53 mm N/A 90 N/A 120.24 mm
N/A
120999 		N/A Metric Standard O-Ring N/A Buna N/A 249 N/A 3.53 mm N/A 70 N/A 123.42 mm
N/A
121000 		N/A Metric Standard O-Ring N/A Buna N/A 249 N/A 3.53 mm N/A 90 N/A 123.42 mm
N/A
121001 		N/A Metric Standard O-Ring N/A Buna N/A 251 N/A 3.53 mm N/A 70 N/A 126.59 mm
N/A
121002 		N/A Metric Standard O-Ring N/A Buna N/A 251 N/A 3.53 mm N/A 90 N/A 126.59 mm
N/A
121003 		N/A Metric Standard O-Ring N/A Buna N/A 251 N/A 3.53 mm N/A 70 N/A 129.77 mm
N/A
121004 		N/A Metric Standard O-Ring N/A Buna N/A 251 N/A 3.53 mm N/A 90 N/A 129.77 mm
N/A
121005 		N/A Metric Standard O-Ring N/A Buna N/A 252 N/A 3.53 mm N/A 70 N/A 132.94 mm
N/A
121006 		N/A Metric Standard O-Ring N/A Buna N/A 252 N/A 3.53 mm N/A 90 N/A 132.94 mm
N/A
121007 		N/A Metric Standard O-Ring N/A Buna N/A 253 N/A 3.53 mm N/A 70 N/A 136.12 mm
N/A
121008 		N/A Metric Standard O-Ring N/A Buna N/A 253 N/A 3.53 mm N/A 90 N/A 136.12 mm
N/A
121009 		N/A Metric Standard O-Ring N/A Buna N/A 254 N/A 3.53 mm N/A 70 N/A 139.29 mm
N/A
121010 		N/A Metric Standard O-Ring N/A Buna N/A 254 N/A 3.53 mm N/A 90 N/A 139.29 mm
N/A
121011 		N/A Metric Standard O-Ring N/A Buna N/A 256 N/A 3.53 mm N/A 70 N/A 142.47 mm
N/A
121012 		N/A Metric Standard O-Ring N/A Buna N/A 256 N/A 3.53 mm N/A 90 N/A 142.47 mm
N/A
121013 		N/A Metric Standard O-Ring N/A Buna N/A 256 N/A 3.53 mm N/A 70 N/A 145.64 mm
N/A
121014 		N/A Metric Standard O-Ring N/A Buna N/A 256 N/A 3.53 mm N/A 90 N/A 145.64 mm
N/A
121015 		N/A Metric Standard O-Ring N/A Buna N/A 257 N/A 3.53 mm N/A 70 N/A 148.82 mm
N/A
121016 		N/A Metric Standard O-Ring N/A Buna N/A 257 N/A 3.53 mm N/A 90 N/A 148.82 mm
N/A
121017 		N/A Metric Standard O-Ring N/A Buna N/A 258 N/A 3.53 mm N/A 70 N/A 151.99 mm
N/A
121018 		N/A Metric Standard O-Ring N/A Buna N/A 258 N/A 3.53 mm N/A 90 N/A 151.99 mm
N/A
121019 		N/A Metric Standard O-Ring N/A Buna N/A 259 N/A 3.53 mm N/A 70 N/A 158.34 mm
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