• 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
120943 		N/A Metric Standard O-Ring N/A Buna N/A 230 N/A 3.53 mm N/A 70 N/A 63.09 mm
N/A
120944 		N/A Metric Standard O-Ring N/A Buna N/A 230 N/A 3.53 mm N/A 90 N/A 63.09 mm
N/A
120945 		N/A Metric Standard O-Ring N/A Buna N/A BS839 N/A 3.53 mm N/A 70 N/A 63.50 mm
N/A
120946 		N/A Metric Standard O-Ring N/A Buna N/A BS839 N/A 3.53 mm N/A 90 N/A 63.50 mm
N/A
120949 		N/A Metric Standard O-Ring N/A Buna N/A BS840 N/A 3.53 mm N/A 70 N/A 65.10 mm
N/A
120950 		N/A Metric Standard O-Ring N/A Buna N/A BS840 N/A 3.53 mm N/A 90 N/A 65.10 mm
N/A
120951 		N/A Metric Standard O-Ring N/A Buna N/A 231 N/A 3.53 mm N/A 70 N/A 66.27 mm
N/A
120952 		N/A Metric Standard O-Ring N/A Buna N/A 231 N/A 3.53 mm N/A 90 N/A 66.27 mm
N/A
120953 		N/A Metric Standard O-Ring N/A Buna N/A BS841 N/A 3.53 mm N/A 70 N/A 66.67 mm
N/A
120954 		N/A Metric Standard O-Ring N/A Buna N/A BS841 N/A 3.53 mm N/A 90 N/A 66.67 mm
N/A
120955 		N/A Metric Standard O-Ring N/A Buna N/A BS842 N/A 3.53 mm N/A 70 N/A 68.26 mm
N/A
120956 		N/A Metric Standard O-Ring N/A Buna N/A BS842 N/A 3.53 mm N/A 90 N/A 68.26 mm
N/A
120957 		N/A Metric Standard O-Ring N/A Buna N/A 232 N/A 3.53 mm N/A 70 N/A 69.44 mm
N/A
120958 		N/A Metric Standard O-Ring N/A Buna N/A 232 N/A 3.53 mm N/A 90 N/A 69.44 mm
N/A
120959 		N/A Metric Standard O-Ring N/A Buna N/A BS843 N/A 3.53 mm N/A 70 N/A 69.85 mm
N/A
120960 		N/A Metric Standard O-Ring N/A Buna N/A BS843 N/A 3.53 mm N/A 90 N/A 69.85 mm
N/A
120961 		N/A Metric Standard O-Ring N/A Buna N/A BS844 N/A 3.53 mm N/A 70 N/A 71.44 mm
N/A
120962 		N/A Metric Standard O-Ring N/A Buna N/A BS844 N/A 3.53 mm N/A 90 N/A 71.44 mm
N/A
120963 		N/A Metric Standard O-Ring N/A Buna N/A 233 N/A 3.53 mm N/A 70 N/A 72.62 mm
N/A
120964 		N/A Metric Standard O-Ring N/A Buna N/A 233 N/A 3.53 mm N/A 90 N/A 72.62 mm
N/A
120965 		N/A Metric Standard O-Ring N/A Buna N/A BS845 N/A 3.53 mm N/A 70 N/A 73.02 mm
N/A
120966 		N/A Metric Standard O-Ring N/A Buna N/A BS845 N/A 3.53 mm N/A 90 N/A 73.02 mm
N/A
120967 		N/A Metric Standard O-Ring N/A Buna N/A BS846 N/A 3.53 mm N/A 70 N/A 74.60 mm
N/A
120968 		N/A Metric Standard O-Ring N/A Buna N/A BS846 N/A 3.53 mm N/A 90 N/A 74.60 mm
N/A
120969 		N/A Metric Standard O-Ring N/A Buna N/A 234 N/A 3.53 mm N/A 70 N/A 75.79 mm
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