NBR (Buna-N) O-Rings Manufacturer & Supplier

NBR (Buna-N) O-Rings are one of the most widely used elastomer sealing solutions due to their excellent resistance to oils, fuels, and hydraulic fluids. Nitrile rubber O-Rings are commonly applied in hydraulic systems, automotive components, industrial machinery, and general sealing applications.

NBR O-Ring Material Properties

• Temperature range: -30°C to +120°C
• Excellent resistance to oils, fuels, and hydraulic fluids
• Good mechanical strength and wear resistance
• Cost-effective and widely available
• Available hardness: 60 / 70 / 80 / 90 Shore A

Advantages of NBR O-Rings

• Outstanding oil and fuel resistance
• Reliable sealing performance in hydraulic systems
• Wide operating pressure capability
• Economical solution for industrial applications

Typical Applications

• Hydraulic and pneumatic systems
• Automotive engines and fuel systems
• Industrial pumps and valves
• Oil and gas equipment
• General industrial sealing

Available Standards & Sizes

• AS568 (Inch sizes)
• ISO 3601 (Metric sizes)
• DIN 3771 (Metric sizes)
• Custom NBR O-Rings available

NBR vs FKM O-Rings

NBR O-Rings provide excellent oil resistance at an economical cost, while FKM O-Rings are better suited for high-temperature and aggressive chemical environments. Choosing the right material depends on operating temperature, media, and application requirements.

Custom NBR O-Rings

We manufacture custom NBR O-Rings in various formulations, hardness levels, and sizes to meet your specific sealing requirements. OEM and ODM services are available for global customers.

Request a Quote for NBR O-Rings

Contact us with your size, standard, working temperature, application, and required quantity. Our engineering team will provide a fast and accurate quotation.