• 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
123478 		N/A Metric Standard O-Ring N/A Buna N/A 321 N/A 5.33 mm N/A 90 N/A 29.51 mm
N/A
123479 		N/A Metric Standard O-Ring N/A Buna N/A 322 N/A 5.33 mm N/A 70 N/A 31.12 mm
N/A
123480 		N/A Metric Standard O-Ring N/A Buna N/A 322 N/A 5.33 mm N/A 90 N/A 31.12 mm
N/A
123481 		N/A Metric Standard O-Ring N/A Buna N/A 323 N/A 5.33 mm N/A 70 N/A 32.69 mm
N/A
123482 		N/A Metric Standard O-Ring N/A Buna N/A 323 N/A 5.33 mm N/A 90 N/A 32.69 mm
N/A
123483 		N/A Metric Standard O-Ring N/A Buna N/A 324 N/A 5.33 mm N/A 70 N/A 34.29 mm
N/A
123484 		N/A Metric Standard O-Ring N/A Buna N/A 324 N/A 5.33 mm N/A 90 N/A 34.29 mm
N/A
123485 		N/A Metric Standard O-Ring N/A Buna N/A 325 N/A 5.33 mm N/A 70 N/A 37.47 mm
N/A
123486 		N/A Metric Standard O-Ring N/A Buna N/A 325 N/A 5.33 mm N/A 90 N/A 37.47 mm
N/A
123487 		N/A Metric Standard O-Ring N/A Buna N/A 326 N/A 5.33 mm N/A 70 N/A 40.64 mm
N/A
123488 		N/A Metric Standard O-Ring N/A Buna N/A 326 N/A 5.33 mm N/A 90 N/A 40.64 mm
N/A
123489 		N/A Metric Standard O-Ring N/A Buna N/A 327 N/A 5.33 mm N/A 70 N/A 43.82 mm
N/A
123490 		N/A Metric Standard O-Ring N/A Buna N/A 327 N/A 5.33 mm N/A 90 N/A 43.82 mm
N/A
123491 		N/A Metric Standard O-Ring N/A Buna N/A 328 N/A 5.33 mm N/A 70 N/A 46.99 mm
N/A
123492 		N/A Metric Standard O-Ring N/A Buna N/A 328 N/A 5.33 mm N/A 90 N/A 46.99 mm
N/A
123493 		N/A Metric Standard O-Ring N/A Buna N/A 329 N/A 5.33 mm N/A 70 N/A 50.17 mm
N/A
123494 		N/A Metric Standard O-Ring N/A Buna N/A 329 N/A 5.33 mm N/A 90 N/A 50.17 mm
N/A
123495 		N/A Metric Standard O-Ring N/A Buna N/A 330 N/A 5.33 mm N/A 70 N/A 53.34 mm
N/A
123496 		N/A Metric Standard O-Ring N/A Buna N/A 330 N/A 5.33 mm N/A 90 N/A 53.34 mm
N/A
123497 		N/A Metric Standard O-Ring N/A Buna N/A 331 N/A 5.33 mm N/A 70 N/A 56.52 mm
N/A
123498 		N/A Metric Standard O-Ring N/A Buna N/A 331 N/A 5.33 mm N/A 90 N/A 56.52 mm
N/A
123499 		N/A Metric Standard O-Ring N/A Buna N/A 332 N/A 5.33 mm N/A 70 N/A 59.69 mm
N/A
123500 		N/A Metric Standard O-Ring N/A Buna N/A 332 N/A 5.33 mm N/A 90 N/A 59.69 mm
N/A
123501 		N/A Metric Standard O-Ring N/A Buna N/A 333 N/A 5.33 mm N/A 70 N/A 62.87 mm
N/A
123502 		N/A Metric Standard O-Ring N/A Buna N/A 333 N/A 5.33 mm N/A 90 N/A 62.87 mm
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