• 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
121345 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 44.00 mm
N/A
121346 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 44.00 mm
N/A
121347 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 45.00 mm
N/A
121348 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 45.00 mm
N/A
121349 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 46.00 mm
N/A
121350 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 46.00 mm
N/A
121351 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 47.00 mm
N/A
121352 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 47.00 mm
N/A
121353 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 48.00 mm
N/A
121354 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 48.00 mm
N/A
121355 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 49.00 mm
N/A
121356 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 49.00 mm
N/A
121357 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 50.00 mm
N/A
121358 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 50.00 mm
N/A
121359 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 51.00 mm
N/A
121360 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 51.00 mm
N/A
121361 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 52.00 mm
N/A
121362 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 52.00 mm
N/A
121363 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 53.00 mm
N/A
121364 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 53.00 mm
N/A
121365 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 54.00 mm
N/A
121366 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 90 N/A 54.00 mm
N/A
121367 		N/A Metric Standard O-Ring N/A Buna N/A V55 N/A 4.00 mm N/A 70 N/A 54.50 mm
N/A
121368 		N/A Metric Standard O-Ring N/A Buna N/A V55 N/A 4.00 mm N/A 90 N/A 54.50 mm
N/A
121369 		N/A Metric Standard O-Ring N/A Buna N/A N/A 4.00 mm N/A 70 N/A 55.00 mm
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