O-Ring 478x5 NBR 80 ShA

Large-diameter NBR O-ring for industrial applications

Oil-resistant rubber seal with increased hardness

Main product description

The O-ring 478x5 NBR 80 ShA is a high-quality industrial sealing ring designed for applications requiring a large sealing diameter combined with enhanced mechanical strength. On the Polish and European markets, this product is commonly searched under terms such as “O-ring 478x5”, “large NBR O-ring”, “rubber sealing ring NBR” and “industrial O-ring for hydraulics”, confirming its use in professional technical environments.

The sealing ring is manufactured from NBR (nitrile butadiene rubber), a material known for its excellent resistance to mineral oils, greases, fuels and many commonly used industrial fluids. The increased hardness of 80 ShA improves resistance to extrusion and deformation, which is especially important in large-diameter sealing applications exposed to higher pressures.

With a 5 mm cross-section, the O-ring provides uniform compression along the entire circumference, ensuring reliable static sealing and suitability for selected dynamic applications. The stable geometry supports long-term sealing performance while reducing the risk of leakage in demanding operating conditions.

The O-ring 478x5 NBR 80 ShA is widely used in hydraulic and pneumatic systems, industrial machinery, process installations, tanks, flanged connections and large mechanical assemblies. It is a common choice for maintenance, repair and production operations where dependable technical sealing and consistent material quality are required.

B2B customers select this rubber seal for its high resistance, dimensional stability and predictable service life, which help minimize downtime and ensure safe, efficient system operation.

FAQ - Frequently Asked Questions

What material is the O-ring made of?
It is made of NBR, an oil-resistant industrial rubber.

What does 80 ShA hardness mean?
It indicates increased stiffness and better resistance to deformation under load.

Is this O-ring suitable for hydraulic systems?
Yes, it is commonly used in hydraulic and pneumatic applications.

Is it intended for static or dynamic sealing?
Primarily for static sealing, with limited dynamic use depending on conditions.

Where are large-diameter O-rings typically used?
In tanks, flanges, industrial machines and process installations.