• 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
121420 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 80.00 mm
N/A
121421 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 81.00 mm
N/A
121422 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 81.00 mm
N/A
121423 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 82.00 mm
N/A
121424 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 82.00 mm
N/A
121425 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 83.00 mm
N/A
121426 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 83.00 mm
N/A
121427 		N/A Metric Standard O-Ring N/A Buna N/A V85 N/A 4.00 mm N/A 70 N/A 84.00 mm
N/A
121428 		N/A Metric Standard O-Ring N/A Buna N/A V85 N/A 4.00 mm N/A 90 N/A 84.00 mm
N/A
121431 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 85.00 mm
N/A
121432 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 85.00 mm
N/A
121433 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 86.00 mm
N/A
121434 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 86.00 mm
N/A
121435 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 86.50 mm
N/A
121436 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 86.50 mm
N/A
121437 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 87.00 mm
N/A
121438 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 87.00 mm
N/A
121439 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 88.00 mm
N/A
121440 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 88.00 mm
N/A
121441 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 89.00 mm
N/A
121442 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 89.00 mm
N/A
121443 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 90.00 mm
N/A
121444 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 90.00 mm
N/A
121445 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 91.00 mm
N/A
121446 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 91.00 mm
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